The manufacturer recommends this model to be used down to approx. +5ºC. - Cuff adjustment offers a nice fit for all calf sizes - Made of vulcanized G1 70 rubber compound - Adjusting tab at top - Thin liner dries fast - Reinforced heel and toe - Fiber glass shank - Detachable EVA insoles add shock absorption via G1®-stage1technology: heel and front foot shock absorption pads offer a cushioned stride - Field Sport outer sole works in many types of terrain and lasts longer than frost-specific material compounds