how long do you have to soak it?

No need to soak, just wet it thoroughly under the faucet.

Are there different sizes or one size?

One size but they fit everyone from our football team to the coaches. Really work well, just don't dry in dry or use fabric softener. Seems that breaks down the material.

What's the difference between this and the VaporActive model? I would be using it under a motorcycle helmet.

Hello, Our new Mission VaporActive Cooling Skull Cap has an exposed elastic allowing more stretch for a better fit. More importantly it’s a different technology. Vaporactive is our hyper-evaporating technology and our Mission Enduracool (HydroActive) Cooling Helmet Liner is our wet-to cool technology (HydroActive).Please don't hesitate to contact us with any further questions.Thank you,

It says wring it out. Does that mean completely or leave a little cold water in it?

Depends on what you feel like. I use mine mostly dry under a bicycle helmet to block the sun, but when it's really hot outside I wet it. If it's not rung out some, water runs down out of the cap, which isn't bad when HOT. Or ring out enough so it doesn't, you'll learn what you like/need. I have several now, even one with a flap at the back to protect my neck from the sun when mowing. Wish I had these years ago! I like the white best, but they show the dirt fast.

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❄️ Stay cool, stay ahead—beat the heat with Mission’s instant chill skull cap!

HELMET READY COMFORT - Feather-light, non-slip design fits perfectly under helmets and hard hats without bulk or sweat distractions.
SUN SMART PROTECTION - UPF 50 fabric shields your skin from harmful rays while keeping you cool and comfortable.
ALL SEASON VERSATILITY - Engineered for year-round use—whether running, cycling, football, or outdoor work, it’s your go-to cooling companion.
INSTANT CHILL ANYTIME - Activates in under 1 minute with just water—cool down fast and stay fresh for up to 2 hours.
CHEMICAL FREE COOLING POWER - HydroActive technology delivers lasting, natural cooling that never washes out—safe and sustainable performance.

The Mission Cooling Skull Cap is a high-performance, lightweight helmet liner and beanie that cools instantly up to 30°F below body temperature when wet. Featuring breathable mesh ventilation, UPF 50 sun protection, and chemical-free HydroActive cooling technology, it’s designed for active professionals and athletes who demand comfort and protection under helmets or on its own. Durable, machine washable, and perfect for all seasons and sports.

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Age Range	Adult
Color	Digital Camo Gray
Size	One Size
Style	Beanie
Material Composition	Body: 92% Polyester/8% Spandex; Mesh: 100% Polyester
Material Type	Polyester Spandex
Number of Pieces	1
Outer Material	Polymer
Season	Fall, Spring, Summer, Winter
Features	Breathable, Sun Protection
Sport	Football, Triathlon
Included Components	Mission Cooling Helmet Liner- Digital Camo Grey
Batteries Included?	No
Brand	MISSION
Department	unisex-adult
Manufacturer	Mission Athlete Care
Item model number	103908
Product Dimensions	26.67 x 26.67 x 10.16 cm; 9.07 g
ASIN	B00UR4HPEI

Mission Cooling Skull Cap- Hat, Helmet Liner, Running Beanie, Evaporative Cool Technology, Cools Instantly when Wet, UPF 50 Protection, for Under Helmets, Hardhats, Running, Football

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