Check the listing for details. Skull Cap Helmet Liner Cycling Running Sweat Wicking Beanie Fits Under Helmets. Color: Black, dark blue, dark gray, Condition: New with tags. Listed at 5.99 USD. Product Description Features: 1. PREMIUM PERFORMANCE: Made of polyester fabric, more soft, and quick-drying. 2. READY FOR DUTY: Works amazingly as a helmet liner if you\'re mountain biking, road racing, motorcycling, skiing, snowboarding, hitting the slopes and working outside and will keep sweat at bay if you're shooting hoops. 3. COMFORTABLE: Holds your hair in place, a cure for messy hair, and keeps hair looking good after several hours in a helmet. In addition, the material stops sweat from dripping into your eyes on hot days. 4. FITS YOUR HEAD PERFECT: The lightweight, stretchy material makes this beanie snug but not too tight! Specifications: Material: Polyester Size: 25x16.5cm Weight: 60g Cap circumference: 55-61cm Theme: Sports Features: UV protective, elastic, quick-dry Size: One size fits all adults, unisex sports Headwear. Sport Type: Cycling, Riding, Skiing, Hiking, Fishing, Skating Package Includes: 1 x Cycling Helmet Cap