Heatwave™ Format™ Beanie Mapped Built-in back support

Built-in back support

It has all the same features of our classic Sunthing®

With waterproof

Recommended for: cold weather winter adventures

Heatwave™ Format™ Beanie Mapped Built-in back support55% Polyester, 20% Acrylic, 20% Nylon, 5% Wool Brushed Heatwave band lining An awesomely warm beanie, the Format hat from Seirus is not only stylish, its also bolstered by the heat return technology of Heatwave. The revolutionary dual heating system found in the Seirus exclusive Heatwave lining reflects and amplifies your bodys heat to produce that warm cozy feeling we all look for in a winter hat. So you never have to sacrifice style for warmth.