Zamberlan Men's 232 Airound Mid Gore-TEX&reg; Hiking Shoe Rubber Gore-Tex Surround Technology - This allows the internal climate of the shoe to breathe more than ever before, while maintaining uncompromising waterproof protection. 3D Mesh - Provides 360 degree interior ventilation. PU sealing - Supports and stabilises the upper framework. Net insert with a jazz gusset - These materials wrap the foot and keep it comfortable and secure while also providing stability and torsional rigidity. Toe and heel cap - Abrasion resistant materials that diminish debris.