| RefrigiWear Fat Cap | Black | Ragg Wool/Acrylic | One-Size. RefrigiWear No matter who you are, this is the cap you need for cold weather protection. The Fat Cap has a 4-layer acrylic knit that keeps your head crazy warm. Plus, it's got enough stretch to fit almost every head size, from Youth to 2XL. Thick 4-layer acrylic knit provides superior warmth Micro denier knit is soft against skin Stretches to fit Youth to 2XL sizes RefrigiWear Fat Cap | Black | Ragg Wool/Acrylic | One-Size... - RefrigiWear Fat Cap | Black | Ragg Wool/Acrylic | One-Size. |