M-Tac's lightweight and warm fleece hat for cool and cold weather. The hat is made of microfleece, which makes it lighter than even the finest wool. The hat doesn't saturate the moisture and dries quickly. It also prevents itching and irritation (which is wool or polycotton does). Low profile design fits easily under the helmet and hood. Slimtex is a unique modern insulation that reliably retains heat, creates a feeling of softness and comfort. Slimtex is hygroscopic and hypoallergenic, has a low thickness and high thermal insulation, flexibility, elasticity, and durability. Using this particular insulation you get reliable warmth without unnecessary bulk. Material:100% Polyester SLIMTEX S-100Fabric density:260g / m2