Seirus Heatwave Skull Liner, in Black

This Seirus-exclusive Heatwave skull cap features a kinetic-heat return system--the first dual-stage heating system for your head. The Heatwave process converts emitted kinetic energy into increased heat that reflects radiated heat back for more warmth.

• Unisex sizing
• 83% polyester, 17% spandex
• Four-way stretch skull cap
• Heatwave lining with kinetic-heat return system
• Cut and sewn for a form-fitting construction