The Grubs Frostline is insulated and waterproof, with excellent grip, made for all day comfort. 5MM INSU-FOAM ULTRA™ – gives all round foot comfort and insulation. 6mm NITROCELL™ footbed – provides a soft cushioning for an athletic shoe feel. A million microscopic nitrogen bubbles that insulate the wearer from cold surfaces. UNDERFOOT CHASSIS™ – give a sure footed platform. HEXZORB™technology – absorbs heel strike shock for daylong comfort. SUPERDRI™ lining – is 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. TRAX™ outsole – superior grip on a variety of surfaces, the tread is designed to work with the action of the foot COMFORT RATING – -20ºc to 20ºc. Please call to order more sizes available 01229 861444
