Lake MXZ 304 Wide is a high quality cycling shoe with Lake's Winter Last. With a much wider & taller toebox than Lake's traditional lasts, the Winter last allows the foot to maintain proper circulation even when thicker socks are worn. The winter last is the standard for winter cycling footwear. Closure: Tongue Mounted Push/Pull Mid-Power BOA closure system with larger dial for easy adjustment while wearing winter gloves Temperature rating: Comfortable down to 7°F and up to 45°F ( -14°C to 7°C ) Outsole: Heavy duty Mountain V outsole by Vibram Upper: Pittards WR100 leather Outlast temperature regulating liner 3M Thinsulate lining in toe box Thermosol composite insulation insole  Fitting Tip: For use with winter weight socks Lake recommends that you go 1 ~ 1.5 size up from your normal cycling shoes.