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King Killers Review 2026: Is King Killers Worth It? We Break Down 10 Best-Sellers
Last updated October 2026 · Researched from kingkillers.co, customer reviews and Trustpilot
King Killers 2-in-1 gym shorts with compression liner, worn for an outdoor training session
If you train boxing, BJJ, Muay Thai or MMA, you have probably scrolled past loud dragon prints, camo sleeveless hoodies and "Got Hands?" trucker hats from King Killers and wondered whether the gear is actually good or just good at Instagram. This King Killers review answers that question. The brand promises fighter-designed apparel at fair prices, built by an independent, fighter-owned business in Florida rather than a big sportswear boardroom.
We did not wear-test these pieces ourselves. Instead, this review is based on the brand's own product specs and fabric details, its shipping and returns policies, the star ratings shown on kingkillers.co, and what customers say on Trustpilot. We also checked the current discount in a live cart so the savings figure below is real.
Bottom line: King Killers makes fun, distinctive combat-sports apparel at mid-range prices, but you should order with patience on shipping and read the return rules first.
Quick Verdict
Best for: Fighters and gym-goers who want bold, combat-sports graphics and want to support a small, fighter-owned brand
Skip if: You need gear fast, want easy free returns, or prefer plain, minimal training clothes
Price range: About $19.99 to $74.99 for most items at time of writing (October 2026), with most shorts and hoodies between $49.99 and $64.99
Our rating: 3.8/5, based on fabric specs, strong on-site product ratings, a mixed 3.0 TrustScore on Trustpilot, and a fairly strict return policy
What Is King Killers?
King Killers (King Killers Apparel) is a combat-sports clothing brand founded in 2021 by professional fighter Michael "Heck" Heckert, who has competed in MMA, boxing and professional bare-knuckle fighting, including BKFC. The company is based in the Tampa Bay area, with a St. Petersburg, Florida address on its site and a returns office in Pinellas Park.
The name comes from a fight-game idea: a "king killer" climbs the rankings to earn a shot at the champion. That attitude shows up in the catalog, which runs to more than 100 products: sleeveless drop-armhole hoodies, all-over-print athletic shorts, 2-in-1 compression shorts, rash guards, swim trunks, joggers, graphic tees, hats and boxing-glove necklaces. It sells direct-to-consumer on its own Shopify store, and many printed pieces are made to order. Pricing is mid-range: more than fast-fashion gym wear, less than premium fight brands.
Is King Killers Legit?
Yes, King Killers appears to be a legitimate, small US business. It has been operating since 2021, lists a physical Florida address, email (sales@kingkillers.co) and phone number, and publishes clear shipping and return policies. The founder is a real, active pro fighter, and the brand's blog covers his upcoming BKFC bouts.
The red flags are about service, not scams. Search snippets from Trustpilot show a 3.0 TrustScore from about 20 reviews, with complaints that orders shipped slower than the estimate shown at checkout. The brand has replied to roughly two-thirds of its negative reviews, which is a reasonable sign. Product-level ratings on the site itself are much higher, but those sample sizes are small.
The Best King Killers Products, Reviewed
1. Dragon Slayer Sleeveless Workout Hoodie — Best for Statement Gym Fits
King Killers Dragon Slayer Sleeveless Workout Hoodie in its Japanese-style dragon and wave print
The sleeveless hoodie is the piece most people associate with the brand, and the Dragon Slayer Sleeveless Workout Hoodie is the loudest version. It uses a dropped armhole cut, the old-school bodybuilding style, so your shoulders and lats can move freely while the hood keeps you warm between rounds. The fabric is mostly recycled polyester with a touch of spandex, and the hood is double-layered with a crossover neckline and drawstrings. It is printed and sewn to order, so expect three to six business days before it ships. The size run up to 4XL is generous for a small brand.
Pros
Eye-catching all-over dragon print
Recycled polyester blend with a little stretch
Wide size range, XS to 4XL
Cons
Made to order, so it takes longer to ship
Very bold design is not for everyone
2. Muay Thai Fighter Sleeveless Hoodie — Best for Muay Thai Fans
King Killers Muay Thai Fighter Sleeveless Hoodie in black with the Mongkhon graphic
If the dragon print is too much, the Muay Thai Fighter Sleeveless Hoodie gives you the same drop-armhole cut on a mostly black base with a "Muay Thai" chest graphic built around a Mongkhon headband. It shares the recycled polyester and spandex fabric, the soft-touch exterior and the double-layer hood of the rest of the line. That makes it easier to wear outside the gym, with jeans or joggers. On kingkillers.co it carries a 5.0-star rating, though from just one review at the time of writing, so treat that as a small sample.
Pros
More wearable black colourway
Meaningful Muay Thai symbolism rather than generic text
Same flexible fabric and full size range
Cons
Only one on-site review so far
Made-to-order wait of 3–6 business days
3. 2 in 1 Gym Shorts Double-Layer Athletic Nylon Shorts — Best for Training and Running
King Killers 2 in 1 Gym Shorts in red with a white compression liner
Price: $39.99 (was $44.99) · Material: micro nylon, 4-way stretch · Sizes: S–XL in Red, Black and White
The King Killers 2 in 1 Gym Shorts pair a lightweight nylon outer short with a built-in compression liner. The liner is meant to stop chafing on long sessions and give the support of cycling shorts, while the top layer adds airflow and a cleaner look. There is an adjustable drawstring waist, and care is simple: cold wash and drip dry. The shorts review pool on the site shows 4.88 out of 5 from 25 reviews. The catch is stock: when we checked, only two size and colour combinations were available, both in white.
Pros
Built-in anti-chafe compression liner
Light 4-way stretch nylon
Strong 4.88/5 rating on the brand's site
Cons
Very limited sizes and colours in stock at time of writing
Size range stops at XL
4. Short Sleeve BJJ Rash Guard — Best Budget Pick for Grapplers
King Killers Short Sleeve BJJ Rash Guard in purple with a scale pattern
Price: $29.99 (was $45.00) · Material: 85% polyester, 15% spandex · Sizes: M and L in Red, White, Purple and Gold
At under $30, the King Killers Short Sleeve BJJ Rash Guard is one of the cheapest ways into the brand. The brand says it was designed with active jiu-jitsu competitors, and the 85/15 polyester and spandex blend is a typical, sensible rash guard fabric for a snug, compressive fit. The colours follow belt ranks, which is a nice touch if you want to match your gi. It is listed among the site's best-sellers and holds a 5.0 rating from three reviews. Two drawbacks: it only comes in M and L, and rash guards are non-returnable, so sizing has to be right first time.
Pros
Low price for a branded rash guard
Belt-colour options
Designed with input from competing grapplers
Cons
Only two sizes, M and L
Rash guards cannot be returned
5. King Killers X Mosburg Boxing Collab Fleece Joggers — Best for Everyday Comfort
King Killers X Mosburg Boxing fleece joggers in black with a small embroidered logo
Price: $49.99 (was $60.00) · Material: 65% cotton, 35% polyester 3-end fleece with a 100% cotton face · Sizes: XS–2XL in Black, Navy Blazer, Team Royal and Military Green
The King Killers X Mosburg Boxing fleece joggers are the quiet option in a loud catalog. They use a tightly knit three-end fleece with a soft cotton face, cuffed legs, an elastic waistband with matching flat drawstrings, two front pockets and a back patch pocket. The ribbed gusset at the crotch helps with movement, so they work for warm-ups as well as errands. They hold a 5.0 rating from four reviews on the site. For the longest life the brand recommends a cold, inside-out wash and low tumble dry.
Pros
Thick, soft fleece with a cotton face
Four colourways and good stock
Subtle logo that works outside the gym
Cons
Size range stops at 2XL
Fleece is too warm for summer training
6. Burden of Proof Boxing Glove Necklace — Best Gift Under $20
King Killers Burden of Proof Boxing Glove Necklace in stainless steel
Price: $19.99 (was $30.00) · Material: stainless steel · Size: 23-inch curb chain, pendant about 2.3 × 1.5 cm
The Burden of Proof Boxing Glove Necklace is a pair of engraved boxing-glove pendants on a long stainless steel curb chain. The brand frames it as a faith-and-strength piece for boxers, and it is pitched as a gift for birthdays, graduations and signing days. Stainless steel is a practical choice for a necklace you might sweat in. The listing shows 5.0 stars from 10 reviews, and the brand's similar boxing glove necklace on a 24-inch cable chain sits at the top of its best-seller list at the same $19.99 price.
Pros
Cheapest way to rep the brand
Stainless steel is sweat-friendly
5.0 stars from 10 reviews
Cons
Single silver finish
Small pendant may be too subtle for some
7. Kill Or Be Killed Premium Full Zip Hoodie — Best Heavyweight Hoodie
King Killers Kill Or Be Killed Premium Full Zip Hoodie in black
Price: $52.99 (was $60.00) · Material: 80% combed ring-spun cotton, 20% polyester, 280 g/m² · Sizes: S–2XL in Black and Royal Blue
For colder months, the Kill Or Be Killed Premium Full Zip Hoodie is the most substantial piece we looked at. It is a medium-heavy 280 g/m² fabric made mostly of combed, ring-spun cotton, which usually means a softer, smoother feel than basic fleece. The brand says it is treated for less than 5% shrinkage and runs true to size with a regular fit. The design is understated: a small chest logo on a plain body, so it layers easily over training gear. This was also the item we used to confirm the discount in a live cart, where it dropped from $52.99 to $47.70.
Pros
Heavier, cotton-rich fabric
Low-shrink treatment and true-to-size fit
Full zip is easy to layer
Cons
Only two colours
No on-site reviews yet
8. Black and Gold Paisley Swim Trunks for Men — Best for Pool Days
King Killers Black and Gold Paisley Swim Trunks laid flat
King Killers sells a surprising number of swim trunks, and the Black and Gold Paisley Swim Trunks are a good example of the style. They use an extra-light, fast-dry polyester with a mesh basket lining, mesh-lined side pockets and a drawstring waist. The gold bandana-style paisley is flashy in a fun way. Before you order for a trip, note two things from the brand's own policies: swim trunks can take up to 20 business days to ship, and swimwear cannot be returned.
Pros
Light, quick-drying fabric with mesh lining
Wide XS–3XL size range
Distinctive print
Cons
Shipping delays of up to 20 business days
Swimwear is non-returnable
9. Blood Money Athletic Shorts — Best for Bold Training Shorts
King Killers Blood Money Athletic Shorts with an all-over red money print
The Blood Money Athletic Shorts sit on the brand's best-seller list and show its all-over-print approach well. The red banknote print is high-definition, and the brand says it will not peel, flake or crack because it is printed into the fabric rather than on top. The two-way stretch polyester and spandex blend, side pockets and drawstring make them easy to train in, and they stop a few inches above the knee. Like other printed pieces, they are made to order. The product page shows the same 4.88/5 from 25 reviews as the brand's other shorts.
Pros
Print should not peel or crack
Side pockets for phone and keys
Huge XS–4XL size range
Cons
Two-way stretch is less flexible than 4-way
No compression liner
10. Muay Thai Fighter Graphic Hoodie — Best Classic Pullover
King Killers Muay Thai Fighter Graphic Hoodie with the back print shown
Price: $52.99 (was $60.00) · Material: 50% cotton, 50% polyester, 271 g/m² · Sizes: S–5XL in Black, Red, White, Blue and Gray
The Muay Thai Fighter Graphic Hoodie is a classic pullover with a Mongkhon headband graphic on the front and a larger Thai boxing design on the back. It uses a medium-heavy cotton and polyester blend with no side seams, a roomy kangaroo pocket and a classic fit that the brand says runs true to size. It also has the widest range we found, with five colours and sizes up to 5XL, and every variant was in stock when we checked. It appears on the homepage best-seller list.
Pros
Sizes up to 5XL and five colours
Detailed front and back Muay Thai artwork
Good stock at time of writing
Cons
50/50 blend is less premium than the cotton-rich zip hoodie
No on-site reviews yet
King Killers Quality and Durability
On paper, King Killers uses sensible fabrics for each job. Training pieces lean on polyester and spandex blends (95/5 for sleeveless hoodies and printed shorts, 85/15 for rash guards), which dry quickly and stretch with you. Lifestyle pieces use heavier cotton-rich fleece, from 271 g/m² on the pullover hoodie to 280 g/m² on the premium zip hoodie. The all-over prints are dye-printed into the fabric, which the brand says will not peel or crack.
Sizing varies by style. The brand's own FAQ says tees, hoodies, lined shorts, swimwear and performance pieces use different cuts, so check the measurement chart on each product page instead of assuming your usual size. Care is straightforward: most items are cold wash, low or drip dry, and no dry cleaning. Because rash guards, swimwear and hats cannot be returned, getting size right matters more here than with many brands.
Shipping, Returns and Warranty
US shipping: $4.90, free on orders of $100 or more
Processing time: 1–3 business days for most apparel; made-to-order printed pieces take 3–6 business days
Delivery time: 2–5 business days in the US, 5–10 to Canada, 10–30 worldwide
Swim trunks: delays of up to 20 business days
International cost: from $8.50 to Canada and $10.00 worldwide for the first item; duties are paid by the buyer
Returns: 30 days from delivery for unworn items with tags in original packaging; email the brand first for approval
Return shipping: paid by the customer unless the brand made the mistake
Non-returnable: swimwear, rash guards, hats, custom items, discounted items and gift cards
Warranty: no separate warranty listed; contact the brand right away about damaged or wrong items
King Killers vs. Competitors
Venum: a large, established fight brand with a much bigger range including gloves and shin guards; King Killers is smaller, fighter-owned and more playful with prints
Hayabusa: premium fight gear and technical apparel that is generally priced higher; King Killers is cheaper on rash guards and shorts but less focused on technical performance
Gymshark: mainstream gym wear with fast shipping and broad sizing; King Killers is far more combat-sports specific and has a stronger personality, but slower fulfilment
How to Save at King Killers
The easiest saving is our partner code. Using the King Killers promo code JAYSONREVIEW takes 10% off your entire order, and it applies automatically through our links. We confirmed it in a live cart in October 2026, where it was applied across every item.
Code JAYSONREVIEW: 10% off sitewide, verified at checkout
Sale prices: most items already show a discount against the original price, from small markdowns to about 33% off on the rash guard and necklace
Free shipping: spend $100 or more to skip the $4.90 US shipping fee
Newsletter: the "Join the Ranks" email list promises early access to drops and members-only deals
For the latest offers in one place, you can also see all current King Killers coupon codes on our store page. One caution: the return policy lists discounted items as non-returnable, so if returns matter to you, ask support before you order.
What Real Customers Say
Praise themes:
Standout designs: happy buyers often single out the unique, eye-catching prints
Good quality: positive reviewers describe their shirts as well made and say they love wearing them
Highly rated shorts: the brand's shorts hold 4.88 out of 5 across 25 on-site reviews, the largest review pool in the store
Complaint themes:
Slow shipping: several Trustpilot reviewers say orders took much longer than the delivery estimate shown in the cart, with tracking that sat idle
Limited updates: some buyers felt they got little communication until the parcel arrived
FAQ
Is King Killers a legit brand?
Yes. King Killers is a fighter-owned US business founded in 2021 by pro fighter Michael Heckert, with a Florida address, published policies and a working customer service email. The main complaints are about shipping speed, not missing orders.
Who owns King Killers?
The brand was founded and is run by Michael "Heck" Heckert, a professional fighter who has competed in MMA, boxing and bare-knuckle boxing.
How long does King Killers take to ship?
Most apparel processes in 1–3 business days and arrives in 2–5 business days in the US. Made-to-order prints add 3–6 business days of production, and swim trunks can take up to 20 business days.
Does King Killers have free shipping?
Yes, on orders of $100 or more. Below that, US shipping is $4.90.
Can I return King Killers clothing?
Eligible unworn items can be returned within 30 days of delivery, but you pay return shipping. Swimwear, rash guards, hats, discounted items and gift cards are excluded.
Is there a King Killers discount code?
Yes. Code JAYSONREVIEW gives 10% off your entire order, and we verified it in a live cart in October 2026.
Final Verdict
King Killers is worth it if you want training gear with real personality and like the idea of your money going to an independent fighter rather than a sportswear giant. The fabrics are sensible for the price, the sleeveless hoodies and printed shorts are genuinely distinctive, and pieces like the rash guard and boxing glove necklace are easy, low-cost entry points. The trade-offs are real, though: shipping can be slow, especially for made-to-order prints and swim trunks, and the return policy is stricter than big brands. Order early, check the size chart for each item, and use the King Killers discount code JAYSONREVIEW to take 10% off your order. If you need gear for next week's fight, look elsewhere; if you can wait, King Killers delivers plenty of character for the money.
How We Researched This Review
We did not personally test King Killers products. We reviewed product specifications, fabric details, prices and stock on kingkillers.co, read the brand's shipping, returns and FAQ pages, checked the star ratings shown on each product page, and summarised recurring themes from Trustpilot reviews. We confirmed the 10% JAYSONREVIEW discount by adding an item to a live cart in October 2026.
