The Lurbel Desafio Five Comp socks are unisex H5, specifically designed for trail running. Their structure and composition combat the main causes of blisters: overheating, humidity and friction, while their ergonomic ESP protection structure reinforces the points of greatest friction with the footwear (ESP plantar structure developed in collaboration with the Spanish Association of Sports Podiatry, AEPODE).TECHNOLOGY: Bmax Tetra, a combination of Regenactiv technology and multi-channel fibre, is especially recommended for practising sports with high perspiration at high temperatures. Its composition and structure combat the main causes of blisters: overheating, humidity and friction.1st layer: Maintains optimum skin condition, expelling excess moisture.moisture. Its softness minimises the irritation that can be caused by foot-sock friction. 1st antibacterial barrier combats odour.2nd layer: Structural frame. More adaptability.2nd Antibacterial barrier eradicates odour.