Muck Women's Arctic Sport Ii Mid Arctic Sport Women In Grey M Calvin Klein Women The mesh lining adds breathability FRYEDAY The mesh lining adds breathability when you're pushing hard natural movement & energy Light pressure diffusing Microwobbleboard� midsole � triple density cushioning follows 3 footstep stages (firm heel soft middle medium at toes) Natural arch support Grip suited to country paths light trails Narrow fit � if you have wider feet These mid height boots step up the warmth factor with cosy fleece lining and a 5mm neoprene inner boot for ultimate warmth in conditions as low as minus 40 degrees An EVA molded midsole offers support and the rugged outsole helps grip