La Sportiva Women's Stream GTX Waterproof Mid Hiking Boots - The Stream GTX Women's is a mid-cut hiking boot featuring 360 degree breathability from the Gore-Tex(R) Surround(TM) Technology and an innovative midsole. Durable abrasion resistant mesh upper Nano Cell 2.0 structure provides maximum breathability Vibram(R) XS Trek with Impact Brake System(TM) sole provides traction and grip PU TechLite toe and heel Gore-Tex(R) Surround(TM) aeration channels within the footbed and midsole STB control system inegrates Gore-Tex(R) Surround(TM) ventilation outlets and provides a comfortable, snug fitting, and stable boot 5mm Ortholite Insole TPU inserts Compression Molded EVA Weight: 12.10oz (344g) Style: 24E-900619