Upper Material: natural leather microfiber (synthetic) Lining: TXT-treated cotton Closure: hook-and-loop straps Midsole: TST multi-layer stretch tex Rubber: 4mm rubber You first pair of climbing shoes barely have any rubber, which is fine because you've outgrown them; now you need a new, slightly more aggressive pair of sending boots like the Tenaya Men's Tanta Climbing Shoe. Tenaya designed this shoe with a slight downturn for the moderate aggression that intermediate climbers want for harder projects. The combination of synthetic leather and breathable, odor-resistant cotton lining prevents the upper from stretching like your old leather pair of shoes. Not too soft or too stiff, the Tanta's midsole and rubber sole feel just right for smearing, edging, and heel hooking your way to the top.