Over 15,000 T- shirts Sold

7 REASONS YOUR T SHIRTS ARE KILLING YOUR TESTOSTERONE

See the 7 Reasons ↓

25%

Mens testosterone has dropped 25% in the last 20 years

70%

70% of mens clothing is now made from cheap polyester

 0

Zero brands talking about the effects on your body

REASON #01

Title

Your T- shirts are made from the same plastic as a Coke bottle.

Polyester isn't really a fabric. It's a plastic, the exact same material used to make disposable water bottles, melted down and spun into fibre. Every time you wear it, you're pressing that plastic directly against one of the most sensitive parts of your body.

REASON #02

Title

That plastic contains chemicals that tell your body to produce less testosterone.

Polyester contains a group of chemicals called phthalates. These chemicals act like a signal to your body to slow down testosterone production. Your body reads them as a reason to make less of the hormone you're training to boost.

REASON #03

Title

Tiny plastic particles from your shorts are being found inside men's testicles.

Your balls absorb chemicals 12x faster than the rest of your body. Every time polyester is worn or washed, it sheds plastic particles. Scientists in 2023, confirmed they've been found accumulating inside testicular tissue, where they damage the cells responsible for producing testosterone and healthy sperm.

REASON #04

Title

Polyester traps heat exactly where your body needs to stay cool.

For your body to produce testosterone and healthy sperm properly, your testicles need to stay a couple of degrees cooler than the rest of you. That's literally why they hang outside the body. Polyester traps heat and holds moisture against the skin, the worst possible combination for that area of your body.

A study of 656 men found that those who wore breathable, natural fabrics had 25% higher sperm count than men who wore tight synthetic alternatives.
GRFTR LITE TEE
GRFTR LITE TEE
GRFTR LITE TEE
GRFTR LITE TEE
GRFTR LITE TEE
GRFTR LITE TEE

4.8/5 | Over 15,000 T - shirts Sold

GRFTR LITE TEE

Men wearing breathable natural fabrics report significantly better comfort than those wearing synthetic alternatives.

Regulates Temperature

All Natural Fabrics

Sweat - Proof Blend

Soft as Cashmere

Organic Cotton Mix
Size

99-Day Extended Returns & Exchanges

BUY 3 GET 20% OFF

Free Shipping On 2+ Items

Spring Sale

“Didn’t realise how bad my old tees were until I wore this — way cooler, way more comfortable on site.” 

JOEL J.

Verified Buyer

REASON #05

Title

Working out is actually the worst time to be wearing plastic against your skin.

When you exercise, your pores open up to let sweat out. That's also when they're most open to letting things in. Sweat acts like a solvent that pulls chemicals off the fabric, and your open pores absorb them straight into your bloodstream.

REASON #06

Title

Men's testosterone has been crashing for decades and scientists think plastic chemicals are a big reason why.

A 2021 study of over 4,000 men confirmed that young men today have nearly 25% less testosterone than young men did 20 years ago. Doctors and researchers keep pointing to plastic chemicals in the environment as one of the main things they can't otherwise explain.

REASON #07

Title

Gym brands know. They just make more money saying nothing.

Over half of clothing today is made from polyester, a plastic. Cheap to produce, easy to scale, and everywhere on site. But that shift away from natural fabrics like cotton has come at a cost. More heat, less breathability, and a tee that works against you, not with you.

SO WHAT TO WEAR INSTEAD?

GRFTR tees are made from 100% organic cotton. No polyester. No plastic fibres. Nothing that traps heat or works against you on site. 

 

HERE'S WHAT ACTUALLY HELPS:

No plastic chemicals against your body

 

No polyester. No synthetic fibres. Nothing trapping heat or sticking to you all day.

Sweat moves away from your skin

 

Organic cotton lets air flow through, keeping you cooler on site instead of overheating.

No microplastics

 

Natural fibres don’t shed plastic particles. What you wear stays clean and simple.

Your body stays at the right temperature

 

No cling, no stiffness — just a tee that moves with you from start to knock-off.

Built for real work

 

Durable enough for the job, without feeling heavy or restrictive.