Grubs Ptarmigan 5.0™ Ankle Boot are styled like a traditional lace up walking boot but constructed like an ankle wellington boot. This robust boot has a toughened outer layer and a 5mm of thick insulating foam which will keep your feet very warm and comfortable. The lining is a terry Knit lining which is highly effective at wicking the moisture away from your feet keeping them dry and prevent rubbing. The Vibram Multi-Sport™ outsole offers superior traction and stability on all surfaces which is ideal for rough terrain in wet harsh conditions making it the perfect choice for hiking stalking and all outdoor activities. Available in Green in sizes UK 4-13  Insu-Foam Ultra™ - a compression set of less than 7% compared to 20-25% found in other neoprene boots on the market 5.0 Technology™ - A moisture-wicking terry knit liner for the ultimate stretch around the ankles Ankle length for good protection Removable 6mm Nitrocell™ footbed which uses a nitrogen bubble structure which increases the cushioning and insulating properties from cold surfaces Super-Dri ™Fleece lining which is soft and extremely warm and comfortable A bouncy comfortable shock absorbing sole that prevents aching feet 2mm natural rubber shell for a tough exterior that protects the boot with a durable water shedding finish and protects the boot  on the most demanding terrain A comfortable self regulating temperature range of -20°C to +20°C making it great for cold slippy conditions Self hardening layers of Epoxy Impregnated material to stiffen the toe and underfoot chassis for a sure footed platform Vibram Sole has a self cleaning open design to provide traction and safety with a rockered profile for easy foot motion, especially on flat terrain. Multiple small lugs give maximum grip and stability with an undercut heal for downhill braking Grubs Ptarmigan 5.0 Wellington Boot