Zan Headgear SportFlex Helmet Liner/Beanie - Mens POW/MIA III. Flat seams in order to fit comfortably underneath helmets or alone while providing coverage of the head and ears. Fabric is brushed for ultimate softness and has a 4 way stretch for customizable fit. Provides 50+ UV protection and constructed of 87percent polyester and 13percent elastane. Specifications for Zan Headgear SportFlex Helmet Liner/Beanie - Men's: Manufacturer: Zan Headgear Gender: Unisex Age Group: Adults Hat Size US: One Size Hat Style: Beanie Fabric/Material: 87percent Polyester 13percent Elastane Activity/Occasion: Outdoor Package Contents: Zan Headgear SportFlex Helmet Liner/Beanie - Men's Zan Headgear WHLL142R: SportFlex Helmet Liner/Beanie - Mens POW/MIA III