The Grubs Men\'s Frostline 5.0 Boots are tailored for work, walking and leisure activities.With padded insoles and advanced 5.0 thermal engineering that surrounds your foot, your feet will be well-protected in temperatures down to -10°c. Nitrocell - insulating and cushioning footbed for support and comfort. WaterproofAdvanced 5.0 thermal engineering Unique Insu-foam ultra technology - insulatingtemperatures down to -10°c2mm thick layer of tough rubber - lower calf area for protectionUnderfoot chassis Trax sole pattern - small lugsProminent heel - for breaking grip on different terrain