FROSTLINE 5.0™ CLASSIC is insulated and waterproof, with excellent grip. Featuring 5mm INSUFOAM-ULTRA™ neoprene, SUPERDRI™ lining and an ankle height rubber shell, makes the FROSTLINE 5.0™ a practical classic. Features: COLOUR - Violet REINFORCED TOE AND HEEL -To support and protect. TRAX™ OUTSOLE – Designed for maximum purchase and stability with a prominent heel for downhill braking. HEXZORB™ TECHNOLOGY – Hexagonal shock-absorbing component that dissipates shockwaves travelling up through the wearer’s leg. COMFORT RATING – +20°C TO -20°C. * Please note; GRUBS boots are produced in standard U.K. sizes for men and women (unisex sizing) and available in whole sizes only, but will stretch to fit half sizes. There is a 15mm toe allowance built into the sizing to allow for wear of wellie socks etc. * Please note that all Grubs footwear is treated with an anti-blooming agent, which acts to  to protect the boots in transit and at storage / warehouse. The agent is odourless and a colourless oil, and it does evaporate over time leaving no stain or appearance. However from time to time, the inside of the box may be stained upon receipt.