Funny Gym Shirt - The Big Flex Theory Science-Based Lifting Tee - Pump Cover T-Shirt for Gymbros & Fitness Meme Lovers

Geeky Gym Humor: This funny gym shirt features "The Big Flex Theory" – a science-based lifting meme for true gymbros!

Pump Cover Essential: Hide your post-workout pump (or lack thereof) in this hilarious tee designed for lifters & gains chasers.

Gym Meme Approved: Perfect for powerlifting, bodybuilding, or casual flexing – because gains are 90% physics (or so we claim).

Workout Comedy: Rock this shirt to the gym and watch fellow fitness fans chuckle at your "scientifically proven" lifting logic.

Gymbro Gift Idea: Need a funny tee for your lifting partner? This pump cover T-shirt is the ultimate gym meme gift!

Calling all gymbros, science nerds, and lifters who appreciate a good fitness meme! This funny gym shirt combines your love for The Big Flex Theory (because gains don’t lie) with the undeniable laws of science-based lifting. Whether you’re hitting a PR or just pretending to understand physics, this tee is your new pump cover essential.

Why settle for a boring T-shirt when you can rep gym humor that’s sharper than your post-workout DOMS? Designed for bodybuilding, powerlifting, or just flexing in the mirror, this top is a must-have for anyone who knows that fitness is 10% effort and 90% meme-worthy logic.

The Big Flex Theory isn’t just a funny gym shirt – it’s a lifestyle. Wear it to the gym and let fellow lifters wonder if your workout routine is backed by quantum mechanics (or just wishful thinking). Perfect for gymbros who take their gains seriously… but not too seriously.

Looking for the ultimate gym meme gift? This pump cover tee is the ideal present for your lifting partner, that one friend who quotes Newton while benching, or anyone who appreciates fitness comedy. Lightweight, comfortable, and packed with funny gym vibes, this shirt proves that science-based lifting is the only theory worth testing.

So, whether you’re chasing gains, cracking gym jokes, or just need a funny tee to cover up your lack of a pump, this T-shirt has you covered. Because in the gym, the only real law is: lift heavy, laugh harder.

The 100% cotton unisex classic tee will help you land a more structured look. It sits nicely, maintains sharp lines around the edges, and goes perfectly with layered streetwear outfits. Plus, it's extra trendy now!

• 100% cotton
• Sport Grey is 90% cotton, 10% polyester
• Ash Grey is 99% cotton, 1% polyester
• Heather colors are 50% cotton, 50% polyester
• Fabric weight: 5.0–5.3 oz/yd² (170-180 g/m²)
• Open-end yarn
• Tubular fabric
• Taped neck and shoulders
• Double seam at sleeves and bottom hem
• Blank product sourced from Honduras, Nicaragua, Haiti, Dominican Republic, Bangladesh, Mexico

Disclaimers: 
• Due to the fabric properties, the White color variant may appear off-white rather than bright white.
• Dark color speckles throughout the fabric are expected for the color Natural.

This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!

Age restrictions: For adults
EU Warranty: 2 years
Other compliance information: Meets the flammability, lead, cadmium, phthalates and formaldehyde level requirements.

In compliance with the General Product Safety Regulation (GPSR), Next Cult Brand ensures that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact us at info@nextcultbrand.com or write to us Next Cult Brand.