£39.99

A true authentic British Bodybuilding Pump Cover, embodying the old school look with our new pump cover. The Hardcore Pump Cover combines authentic British bodybuilding heritage with contemporary craftsmanship. Built from 100% heavyweight cotton, this oversized silhouette delivers the classic aesthetic with refined construction. Engineered for performance and durability, it stands as the definitive pump cover for serious gym enthusiasts /bodybuilders.

Signature oversized fit / 100% cotton / Heavyweight / New and Improved Quality

The Ultimate Pump Cover.

for those who know true sacrifice

Gruesome Haywire - bringing back old school British bodybuilding attire, one pump cover at a time.

Let customers speak for us

from 23 reviews

reliable, comfortable, and stylish

Just got this gym T-shirt and I’m honestly impressed. The fabric is incredibly high quality and comfortable, which makes a huge difference during intense workouts.

The fit is spot on—not too tight, not too loose—giving full freedom of movement whether you’re lifting, running, or stretching. Plus, it holds its shape and color even after multiple washes, which is a big win.

If you’re looking for a reliable, comfortable, and stylish workout tee, this one definitely delivers. Highly recommend for anyone serious about their gym gear

R Anderson

04/18/2026

10/10 jumper

Unreal pump cover to wear, got multiple compliments in the gym already !!!

Harrison Crowther

03/07/2026

Gruesome!

received the jumper today and I'm more than happy with it, the material is perfect, the fits spot on and the design is awesome! Will be ordering more thank you!

NomadicRookie

02/28/2026

Quality Print and Material

Quality Print and Material. Kai super helpful with sizing…

Scott J

02/28/2026

Just great quality t shirt and great product

Just great quality t shirt and great product.

sean watson

09/22/2025

10/10

Class fit, feels a really good quality heavy T. Definitely be ordering some more gear for gruesome💪🏽

Cal Moughton

09/16/2025

BEST PUMP COVER

Definitely the best pump cover I own, great quality material, breathable and durable. Will
Be ordering more in the future

Ronnie_lifts666

09/07/2025

Quality pump cover

Hands down the best quality pump cover ive bought, recommend highly, second time buying i will definitely be shopping here again. Friendly and helpful customer service.

09/07/2025

Amazing fit such great quality

Amazing fit and design real apparel for the gym no cheap thin material nice and thick and very breathable will buy more . Sizing is incredible cn really get good range of motion when working out

Tristan

09/07/2025

🔥🔥🔥

Top quality shirts at a great price couldn't ask for more

Harry E

09/06/2025

Excellent quality and quick delivery

Jake

09/05/2025

👍

quality is great and fits perfect

Liam L

09/04/2025

Top Quality Clothes

I bought the Union Jack and You decide your fate pump covers, I’ve had plenty of gym clothes from multiple companies. This is by far the best, Comfy on the torso, good enough loose and tightness on the arms section and all around great designs.

Mason

09/04/2025

Spot on

Brilliant quality shirt super comfy 👌

Harry E

05/11/2025

Perfect

Amazing quality print and material! I'll be buying again for sure!

Jim

05/09/2025

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for those who know true sacrifice

Let customers speak for us