Combining a curved, asymmetrical last with a slightly softer construction and thinner sole for enhanced flexibility and sensitivity, the Instinct VS is the cornerstone of Scarpa&';s Performance line-an all-around shoe that handles a variety of styles at the highest level. Tech Specs SIZE OPTIONS : 34 - 45 (half sizes); 46-50 (whole sizes) WEIGHT REFERENCE : 230g; 8.1oz (1/2 pair size 40) UPPER : Microsuede & Leather MIDSOLE : Flexan 1.0mm OUTSOLE : Forefoot: VibramA(R) XS Edge (3.5mm); Heel: VibramA(R) XS Grip2 (2mm) LAST : FV - Moderately Downturned, Moderately Asymmetric PROFILE : Moderately Downturned SYMMETRY : Asymmetric CLOSURE : Strap PRIMARY MATERIAL : Synthetic SOLE RUBBER : VibramA(R) XS Edge, VibramA(R) XS Grip2