The Spire GTX Womens is a low cut mid-duty waterproof hiking/backpacking shoe featuring 360 degree breathability from the ePE Gore-Tex Surround and Nano Cell 2.0 technologies. Durable abrasion resistant mesh upper provides protection while Nano Cell 2.0 structure provides maximum breathability. Nano Cell 2.0 Technology works with ePE Gore-Tex Surround aeration channels within the footbed and midsole. STB control system inegrates ePE Gore-Tex Surround ventilation outlets and provides a comfortable, snug fitting, and stable shoe. Vibram XS Trek with Impact Brake System sole provides traction and grip. Constructed without intentionally added PFAS.