The Lurbel Aitana Four socks are unisex with H4 height, made without seams and with reinforcements in the areas where there is more friction. Also, this garment is differentiated with a letter for each foot and has reinforcements in the areas of greatest friction. Extra +A fit without tightness in the shaft for greater adaptability.PERFORMANCE TETRA (Tetralobal section recycled polyester that transports moisture through its 4 channels, keeping feet dry): Technology based on a first layer composed of an anti-odour mesh combined with top quality fibres that provide maximum performance in all thermal ranges and sporting intensity.AWC 3+ sole structure, optimised for long or ultra distance trail running, where the minimum separation between the relief waves and ventilation waves is sought, with micro-perforated fabric in the areas of greatest impact and double fabric in the toe and heel for greater cushioning and comfort.