Clorts Women's Hiking Shoe Backpacking Trekking Boa Walking Shoe 3D027B 60% Mesh/40% PU Rubber sole Upper material: anti-hydrolysis pu and breathable mesh Boa lacing system Lining:uneebtex waterproof Insole sanitized actifresh technology Outsole: skid-proof and abrasion-resistant rubber outsole Upper material: anti-hydrolysis pu and breathable mesh Outsole: skid-proof and abrasion-resistant rubber outsole Features Boa Closure System, pull and push structure conveniently. Ideally connected to cuff belts for easier, more customizable, and micro adjustability Clorts has imported advanced boa technology from usa to develop high-end new products, which abandon old-fashioned lacing methods.