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.

ASIN	B00UR4HLBK
Age Range Description	Adult
Apparel Closure Type	Pull-On
Best Sellers Rank	#204,728 in Fashion ( See Top 100 in Fashion ) #546 in Men's Skullies & Beanies
Brand Name	MISSION
Color	Black
Customer Reviews	4.4 out of 5 stars 9,316 Reviews
Fabric Type	Polyester/Spandex
Fit Type	loose
Global Trade Identification Number	00812424017546
Hat Form Type	Beanie
Included Components	Mission Cooling Helmet Liner- Black
Item Dimensions	26.7 x 26.7 x 10.2 centimeters
Item Type Name	Helmet Liner
Item Weight	0.02 Pounds
Manufacturer	Mission Athlete Care
Material Type	92% Polyester, 8% Spandex
Occasion Type	construction
Pattern	Solid
Pattern Style	Solid
Product Care Instructions	Machine Wash
Seasons	Spring/Summer
Sport Type	Football, Triathlon
Style Name	Enduracool Cooling Helmet Liner
Style Number	103911
Sun Protection	50 Sun Protection Factor (SPF)
Team Name	Football
UPC	812424017546
Unit Count	1 Count
Water Resistance Level	Water Resistant
character	sports

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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