Warmers | Backwarmer (Men's, Heavy Insulation)For those who need extra warmth, the Heavy Insulation Back Warmer delivers superior thermal comfort. Made with a thicker Angora wool blend, it provides deep, lasting insulation without feeling restrictive. Ideal for colder climates or those who prefer a more substantial layer, this back warmer is a must have for all day coziness. Product Details: Quality craftsmanship: Crafted from 35% Angora, 26% Wool, % Wool, 35% Polyamid and 4% Elastan fabrics.