Features of the Astral Men's TR1 Merge Boot Breathable, quick-dry canvas with protective TPU overlays at toe and heel cap Stabilizing heel counter Padded mesh tongue Removable PolygieneA(R) treated insole Brass hardwAre EVA Foam Midsole Medium arch with Top Shank(TM) Aggressive 5mm lugs with flex grooves, made from G.15(TM) High friction Rubber Non-marking