Lowa Women's Lady GTX Trekking Boot 100% Mountaineering split leather and cordura Classic backpacking boot made for on- and off-trail use with heavy 50- to 60- pound packs for extended trips in the backcountry, with handcrafted construction, and SPS (Supination, Pronation, Support) midsole technology Vibram M-Tec outsole unit with PU midsole for cushioning Climate Control System adds breathability and airflow circulation into the lining Comfort Cuff Spoiler