SPOSURU UltraChill Cooling Sport Cap – Up to 12°C (22°F) Cooler (Pre-Order Exclusive Discount)

Wet it, wring it, shake it — and feel the cooling effect instantly.

Designed for hot-weather sports and everyday activities, the SPOSURU UltraChill Sport Cap uses water-activated cooling fabric to deliver a surface temperature up to 12°C (22°F) cooler. Simply re-wet, wring and shake the cap whenever you need to reactivate the cooling effect.

Cooling fabric extends from the crown to the sweatband, while its lightweight, breathable construction helps release heat and moisture for a cool, comfortable fit. No batteries, ice packs or extra equipment required — just water.

Perfect for sports, commuting, outdoor work, watching games from the sidelines and everyday summer use.

Successfully funded on Kickstarter, Hiyasuru received support from 233 backers worldwide. The campaign raised more than ¥2.38 million against its ¥300,000 goal.

Wet it, wring it and shake it to activate instant cooling.

The water-activated cooling fabric can lower the surface temperature by up to 12°C (22°F). When the cooling sensation starts to fade, simply wet, wring and shake it again to reactivate the effect — no batteries or ice packs needed.

Helps release heat and moisture to keep you cool and comfortable.

The breathable fabric helps release accumulated heat and moisture, reducing the stuffy feeling that often comes with traditional caps. It is designed to remain comfortable during sports, outdoor activities and hot-weather use.

Made to move with you.

A lightweight construction combined with an adjustable, secure fit helps keep the cap comfortably in place during active movement. Designed for extended wear without feeling heavy or bulky.

Cooling whenever you need it.

No batteries, ice packs or special equipment are required. Just add water, wring it out and shake it to activate the cooling effect wherever you are.

Made for repeated use.

The cap is made from 100% polyester and is machine washable, making it easy to clean after sports or outdoor activities. The Searching C FAQ also states that the cooling material is designed to retain its function through normal repeated use and washing, although the perceived cooling effect may vary depending on conditions and care.

About SPOSURU

We believe sports have the power to make life brighter.

SPOSURU is a Japanese company built by people who understand sports firsthand. Our team members are former athletes, and many of us are also parents of children who actively participate in sports clubs and training programs.

In recent years, increasingly intense summer heat has become a growing concern for athletes, children and everyone who stays active outdoors. While rain may easily cancel a practice or game, deciding what to do when conditions are simply “too hot” is often much more difficult.

We never encourage exercising in unsafe conditions. But we also know that many athletes, children chasing their dreams and people working outdoors continue to face the summer heat every day.

That inspired us to explore how cooling technology could help make hot-weather activity more comfortable.

The result is the SPOSURU UltraChill Sport Cap — a simple, water-activated cooling solution designed to help people stay cooler and more comfortable while doing what they love.

Wet it. Wring it. Shake it. Stay cool and keep moving.