This mens Heat Holders bobble hat is available in 4 different colours and in one size fits all. Heat Holders Yarn - Specially developed thermal yarn provides high performance insulation against cold with superior moisture breathing abilities. Heat Weaver Lining - Heatweaver insulation is a plush fleece thermal lining that maximises the amount of warm air held close to the skin. Pom Pom Hat - The new Heat Holders hat has a soft pom pom on the top to give your hat that extra style and character this winter. All these features guarantee that you are toasty warm throughout the cold weather.