- 100% Polyester Winter Thermal Balaclava:High-performance polyester delivers extreme warmth. Ultra-soft microfiber lining for comfort, paired with 3D thermal-lock structure to block cold air. Breathable & moisture-wicking for dryness during activities. Anti-pilling finish resists abrasion (outlasts cotton/linen). Lightweight stretch fabric (65g) conforms to facial contours. Compact foldable for skiing/cycling. Tech-driven comfort for all-day wear.