Premium underwear with integrated cooling technology. Designed for biohackers who refuse to compromise between heat therapy and reproductive health.
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The Product
Premium materials meet functional design. Every detail serves a purpose.
Designed for all-day comfort
Integrated ice pack sleeve
Built for 200°F+ environments
Boxer + 2 cooling packs
The Science
Research shows testicular temperature increases of just 1-2°C can significantly impair sperm production. Koldwear maintains optimal temperature during heat exposure.
Simple Protocol
No complicated setup. Just freeze, insert, and go.
Store cooling inserts in freezer. Ready in 2 hours.
Slide pack into integrated pocket. Secure fit.
Cooling lasts 20+ minutes. Perfect for sauna.
What's Included
Complete kit for sauna fertility protection.
Heat-resistant, moisture-wicking boxer with integrated cooling pocket. Built for 200°F+ environments.
Medical-grade, non-toxic gel packs. Stay cold for 20+ minutes. Reusable hundreds of times.
Quick-start guide with optimal timing, temperature protocols, and usage instructions.
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