Constructed from premium acrylic fabric with cozy fleece inner lining this hat features fine workmanship that brings outstanding softness warmth thickness comfort skin-friendliness and great elasticity it adopts a one-size-fits-most design with strong stretch to fit most adult head circumferences ranging from 21.65 inches to 23.62 inches (55cm to 60cm) it fully wraps around your head and ears to lock in heat and block harsh winter cold wind the practical all-in-one integrated structure combines cap face mask and neck scarf for convenient outdoor wearing the built-in curved visor can shield your eyes from strong sunlight while the thick fleece interior provides reliable all-day warmth in frigid weather