100% Acrylic These ladies Heat Holders Nora styled hats are available in 5 colours. They come in one size and they are machine washable. Heat Holders Yarn – Specially developed thermal yarn provides high performance insulation against cold with superior moisture breathing abilities. Fleece Lined- Having a fleece insulating lining,these hats are even more effective at holding warm air than any regular lining. Heatweaver Insulation -This lining is designed to be soft with a luxurious feel, whilst holding warm air close to your skin, effectively keeping the cold air out. Crochet Knit – These hats have a different look, a gorgeous crochet knit, as opposed to the traditional cable knit look.