Heat Holders thermal hats are created with our high-performance thermal yarn and HEATWEAVER insulation lining to maximise the amount of warm air held close to your body. Heat Holders Hat Features: High-performance thermal yarn Heatweaver insulation lining Holds more warm air 4.49 5 DL D False Bags & Accessories 5.99 5.99 Heat Holders Aviator Hat - Black | Kaleidoscope