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From accessories to keep your gear fresh, to Muay Thai shorts & hoodies.
Shop Mens & Womens Muay Thai Shorts
Designed in the UK, our premium Muay Thai shorts made for hard rounds, not just the mirror.
I built GYM NASTY after my own weight loss journey and trips to Thailand, fixing the things that used to let me down.
Strong stitching, quick dry fabric, colours that last. Get Fight Ready!
You train hard. You bleed sweat. You push through rounds when others tap. At GYM NASTY, we built this brand for fighters who don’t settle. Born from a weight-loss story, refined in Thai gyms, engineered for brutal sessions, our Muay Thai gear is designed in the UK, built to last, and trusted worldwide.
With every stitch, print and fabric choice, we ask: will this survive the ring?
If yes, we release it. If not, we scrap it. Step into gear that’s made to fight.
Why GYM NASTY Exists
I lost over 88 kg, battled through my own version of “can-I make-it”, and trained at dawn when most were still sleeping.
In that grind I realised: I couldn’t find shorts, hoodies or t-shires that kept up. Fades, frays, loosening threads, they were everywhere.
So I built GYM NASTY to fill that gap. To give you gear that backs your ambition. Gear that looks bold. Feels bold. And acts bold.
GYM NASTY started as my promise to make training gear that never lets you down.
Our Muay Thai shorts bring premium satin, fast drying fabric and long lasting prints. Built to go hard every session.
What Makes Our Muay Thai Gear Different
- Premium satin and quick-dry fabrics: built to withstand rounds, not just mirror selfies.
- Strong stitching and long-lasting prints: because training is punishment. Your gear must survive.
- Designed in the UK, shipped globally: one warehouse, one purpose, fighters first.
- Real-talk fit and size inclusivity: from bigger frames to lean war-machines, everyone deserves fight-ready gear.
Let customers speak for us
Amazing quality and lovely fit. Super helpful and friendly, and were very quick to respond to my query!
A great edition to my shorts collection, these shorts are robust and lightweight, looking forward to wearing these in the ring and at training
I recently purchased this hoodie and I am more than happy with the quality of the garment I received, it is extremely well made and comfortable and looks awesome 5⭐️
Chuffed with this, best quality for money by a long shot.
Material top quality, sizing top quality and customer service absolutely brilliant! Will be ordering again soon…
Just received my hoodie and I couldn’t be happier! The quality is genuinely incredible, super soft, the right amount of thickness, and feels like it’s built to last. The fit is absolutely perfect too: comfy, and true to size. It can see it will quickly become my new favourite hoodie. Highly recommend!
Thank you for the t shirt realy good quality will be ordering all of them..
My order just arrived today and I'm so happy!
The jumper is so thick and high quality, looks and feels amazing, and really comfy! It's my first time buying anything from Gymnasty, and James, the owner, is fantastic. Can't wait to buy more bits from this brand!
Got gifted these from the missus, I have the Ying set and the Nak Suu t shirt along with the deodorisers, everything is always top quality! Never an issue with fit, if I’m training I’m wearing Gym Nasty! Keep it up! And keep training!
Thank you ❤️
P.s stop buying rubbish shorts from Amazon and get Gym Nasty you will not be disappointed 💜❤️🖤
After scouting the internet I eventually found these amazing shorts! They look amazing and fit my 320lb frame perfectly! Can't recommend highly enough! No matter what size you are but particularly if you're bigger then you need these!! So happy 😊
Excellent product, I have tried a few different types of
glove glove fresheners over the years these are probably the best I've tried, quick delivery and good communications from the Gymnasty team 👍🏼
This hoodie took me by surprise I was expecting more tight fitting, thinner sport material, I was pleasantly surprised when I was told it's more premium cotton style.
Fits brilliantly, thick warm and comfy. Would have come in handy during the cold Scottish winter! ❤️
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