UltraChill
Sport Cap
Don't Miss Super Early Bird Pricing
The Problem
Extreme Heat
Heat is every athlete's enemy.
It drains your focus and kills your performance.
Your Body Overheats. Your Performance Drops.
Traditional caps trap heat. Hiyasuru's evaporative cooling technology does the opposite — it actively pulls heat away from your head, feel 22°F cooler, keeping you focused and performing at your peak.
How It Works
3 Simple Steps
No batteries. No chemicals. Just add water.
Wet
Soak the cap in water for 30 seconds.
Wring
Wring out the excess water gently.
Shake
Give it a shake — instant cooling activates.
Limited Early Bird Spots
Get Super Early Bird Access
Product
Engineered to Beat the Heat
The Hiyasuru UltraChill Sport Cap uses advanced evaporative cooling fabric that activates with water. Simply wet, wring, and shake — and feel up to 22°F cooler instantly. Designed for athletes who refuse to let heat slow them down.
- 100% Performance Polyester
- Up to 22°F (12°C) body cooling
- Wet · Wring · Shake — 3-step activation
- Available in Adult & Kids sizes
- Lightweight & packable design
Hiyasuru
Normal Cap
Use Case
Stay Cool, Perform More
Athletes
Runners
Fitness
Outdoor
DAILY USE
3 Colors
Portable
HANG EASY
Washable
Launching on Kickstarter · April 2025
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Stay Cool.
Join the early access list to unlock Super Early Bird pricing — exclusive to subscribers. Limited spots available.