GORE-TEX insulation The SOLID GEAR Tigris GTX AG Low offers a unique combination of traction, light weight, superior cushioning and breathability. This model combines the Arctic Grip Pro feature from Vibram with waterproof GORE-TEX insulation. The highest level in every detail ensures the best performance in this class of footwear. Upper: Nubuck and CORDURA Membrane: Partelan wool GORE-TEX insulation. Outer sole: Vibram Arctic Grip Pro rubber Midsole 1: EVA Midsole 2: ETPU insole Insole: PU foam Feature: Boa Fit System Cut: Wide Sizes: 36-48 Safety standard: EN ISO 20345:25XL S3, WR, SRC Protection: Fiberglass protective instep and soft metal-free toe contact area