HeatWeaver® plush lining Roll-up design Fine rib construction Advanced insulating yarn Heat Holders® Roll Up Hat is exceptionally thermally effective, with a luxurious HeatWeaver® plush insulating liner that has been developed to hold even more heat in. The super soft, plush lining feels great against the skin and it's also very efficient at using the heat that naturally rises from your head to keep you warmer for longer.
