Features: Make of Neoprenes rubber, which characterised by soft, highly elastics and excellent heat insulation performances. Good insulation of the Neoprenes socks keep you warm in cold water and protects your feet from sharply object. Equipped with fasteners, you can adjust the tightness according to your need. And it can prevent sand and others from entering. The soles of this Socks is equipped with nonslip rubber particle and durability fabric, which increases the slip resistance and abrasion resistance of the socks. Simple put on these Neoprenes socks and will feeling safe and comfortable even when you run in sand, rough conditions. Specifications: Material: Neoprenes rubber Color: black/gray/pink/blue Size: XS/Small/M/L/extras large/XXL Size:XS Bottom Length:21-21.50cm(8.27-8.46inch) Socks Mouth Diameter:10cm(3.94inch) Height:15.0cm(5.91inch) Size:S Bottom Length:22-22.50cm(8.66-8.86inch) Socks Mouth Diameter:11.50cm(4.53inch) Height:16.50cm(6.50inch) Size:M Bottom Length:23-23.50cm(9.06-9.25inch) Socks Mouth Diameter:13cm(5.12inch) Height:17cm(6.69inch) Size:L Bottom Length:24-24.50cm(9.45-9.65inch) Socks Mouth Diameter:13.50cm(5.31inch) Height:18cm(7.09inch) Size:XL Bottom Length:25-25.50cm(9.84-10.04inch) Socks Mouth Diameter:14.50cm(5.71inch) Height:19cm(7.48inch) Size:XXL Bottom Length:26-26.50cm(10.24-10.43inch) Socks Mouth Diameter:16cm(6.30inch) Height:21.50cm(8.46inch) Package Includes: 1pair Neoprenes Socks note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.