The Grubs PTARMIGAN 5.0™ lace up ankle boot is a fantastic for general activities all year round thanks to the 5MM INSUFOAM-ULTRA™ combined with the SUPERDRI™ lining. The 6mm NITROCELL™ footbed is an integral part of the insulation package, but also provides excellent comfort. The PTARMIGAN™ 5.0 is perfect for tackling more adventurous terrain, thanks to the VIBRAM® MULTI-SPORT OUTSOLE that gives you superior grip on all surfaces and on higher grounds.   VIBRAM® MULTI-SPORT OUTSOLE - Is both lightweight, yet self cleaning and provides good grip levels on most surfaces.       5MM INSUFOAM-ULTRA™ NEOPRENE WITH ANKLE HEIGHT RUBBER - for comfort and warmth       UNDERFOOT CHASSIS™ - give a sure footed platform       6mm NITROCELL™ footbed - provides a soft cushioning for an athletic shoe feel. a million microscopic nitrogen bubbles that insulate the wearer from cold surfaces.       SUPERDRI™ lining - hard wearing, wicks moister away from the wearer’s foot to prevent a sweaty and uncomfortable feel. It is fungus and rot proof so will not smell like cotton-lined boots.       Reinforced toe and ankle - protects wearers toe box and ankle during daily activities.        COMFORT RATING -20ºc to +20ºc.   VIBRAM® VIBRAM® is and Italian based sole manufacturer renowned for their high grip mountaineering soles. The company was form shortly after the end of the Second World War in the foothills of the Alps of Northern Italy by its founder and keen climber Vittorio Bramani. GRUBS®was the first company to put a VIBRAM®sole on a Rubber boot in 2006 and has continued to work closely to bring innovative new products to market.   SUPER-DRI™ LINING Moisture wicking linings use thousands of fibre loops that cosset the foot and wick away moisture keeping the wearer dry and comfortable. Combined with 5.0 INSU-FOAM ULTRA™ to provide an unequalled comfort range without sweat and heat build up. Grubs PTARMIGAN 5.0™ Lace Up Ankle High Neoprene Welly Boot Thermal Lined