HEAT HOLDERS® thermal hats are created with our high performance thermal yarn and HEATWEAVER® insulation lining to maximise the amount of arm air held close to your body. Heat Holders Hat Features: One size Washable Outer 100% Acrylic Lining 100% Polyester Available in: Black 4.49 5 False 5.99 5.99 Heat Holders Ladies Thermal Arden Hat | Kaleidoscope