Hi-tec Rupert Cap Properties: will ensure thermal comfort on frosty days durable construction fitted and flexible will allow the skin to breathe the material does not cause allergies or irritations one size fits all classic cut Material : acrylic Color: black;Hi-tec Rupert Cap Properties: will ensure thermal comfort on frosty days durable construction fitted and flexible will allow the skin to breathe the material does not cause allergies or irritations one size fits all classic cut Material : acrylic Color: dark gray