Men's thermoactive leggings 4F M104, navy blue 4FAW23USEAM104 31S Men's thermoactive leggings 4F are a seamless model that is perfect as underwear under a ski suit. The length of the trousers is ankle-length. Made of elastic and fitted fabric using 4FSkin technology. Perfect as the first layer of clothing. They do not cause abrasions and irritations. Material: 64% polyamide, 28% polyester, 8% elastane