1. Shrinks Your Balls

Medical studies have shown that polyester leads to decreased fertility, reduced sperm production, and visibly smaller testicles.

2. Microplastics Infiltrating Your Body

Every time you work out in polyester, micro-toxic particles break off and penetrate your skin. Sweat opens your pores, making it easier for these microplastics to be absorbed.

3. A goldmine for the industry, a nightmare for your body

If brands use so much polyester, it's not for your benefit—it's because it maximizes their profit margins.

While they're cashing in, you're wearing shorts made from recycled plastic that's loaded with toxins

4. Switch to All-Natural

No more plastic against your skin. MerinFit shorts are made with zero polyester and combine only merino wool and organic cotton for healthy, breathable, odor-free comfort.

5. Test them out for 60 days

We're so confident you'll love them, we offer a 60-day risk-free trial.

If you're not 100% satisfied, we'll give you a full refund—no questions asked.

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Perfect for every season

check Natural temperature regulation: Stay cool in the heat of summer and warm when temperatures drop. Forget about polyester sticking to your legs.

check Optimal moisture management: Merino wool absorbs and wicks away sweat quickly, keeping you comfortably dry from morning to night.

check Designed for any activity: Flexible and durable, MerinFit shorts adapt to intense workouts, hiking, and everyday life.

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  • All Natural Fabrics

  • Regulates Temperature

  • Moisture-Wicking

  • Soft As Cashmere

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      60 day money-back guarantee

      Don't love your MerinFit Shorts? No worries. We offer a 60-Day Money-Back Guarantee

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      Performance tested

      Designed and tested by athletes to ensure maximum comfort and durability.