Lightweight, comfortable, and functional base layer made from 100% RWS-certified merino wool – designed for hiking, trekking, and light training sessions. The Inner:Pure series relies on the natural temperature regulation and moisture transport properties of merino wool. The sophisticated wool mesh fabric in exposed areas ensures optimal ventilation, while the denser structure in other areas guarantees maximum thermal insulation. This gives you the perfect balance between protection and breathability – whether you're doing intense activities or leisurely hikes. The Responsible Wool Standard certification guarantees that the wool has been sourced under ethical and sustainable conditions. Thanks to the natural properties of merino wool, this base layer remains odor-resistant and requires significantly less frequent washing than synthetic alternatives – perfect for multi-day tours and adventures in nature.