The Cotton Slub range from Birkenstock features a beautiful slub yarn effect that is reminiscent of hiking boot socks. Impressive Birkenstock men's socks in blue and white, with reinforced and pliant toe and heel sections to boost durability and comfortable flexibility. Fabricated in an extremely high level of sock, skin-friendly cotton for outstanding natural comfort. The authentic original BIRKENSTOCK logo helps ensure a high degree of brand recognition. Pressure-free, elasticated cuff for excellent grip on the leg. Flat toe section for outstanding comfort. Authentic original BIRKENSTOCK logo on the calf. Small = UK 5.5-7.5 (Eur 39-41), Medium = UK 8.0-9.5 (Eur 42-44), Large = UK 10.5-12.0 (Eur 45-47)