Rolling Thunder PureDuck Performance Hat, Frost Grey The Rolling Thunder PureDuck Performance Hat in Frost Grey combines a lightweight polyester fabric with an unstructured crown. The relaxed crown gives the cap a less rigid shape, while the pre-curved visor supplies its familiar cap profile. This version uses the Imperial X210P hat as its foundation. The fabric is designed to wick perspiration and carries a UPF 35 rating. A hook-and-loop rear strap allows the circumference to be adjusted without a fixed fitted size. These details make the hat straightforward to select for everyday wear, with the named Rolling Thunder design and color providing its visual identity. Key Features Performance fabric: 100% lightweight polyester with moisture-wicking properties. Adjustable closure: Hook-and-loop rear strap. Relaxed profile: Unstructured crown and pre-curved visor. Sun rating: UPF 35 fabric rating. Specifications Brand: Rolling Thunder Design: PureDuck Color: Frost Grey Base hat: Imperial X210P Material: 100% polyester Shop the Rolling Thunder PureDuck Performance Hat, Frost Grey at BattleHawk Armory.