This FG model (Firm Ground) features a sole pattern designed for terrain with relatively firm surfaces: the lugs are lower and more stable than those found in models specialized for muddy conditions. While the sole is more rugged compared to barefoot shoes made for asphalt and general use, these shoes still give your feet plenty of work. The structure has minimal torsional stiffness or shock absorption. - A slightly wide last allows your big toe to remain in its natural straight alignment - Highly functional on both soft and rocky terrains - Light protection at the toe - Upper material is breathable and quick-drying mesh fabric - Sole thickness: 7 mm - Flexible quick-lacing system - Ortholite insoles (made from 98% recycled polyurethane) Materials: - Upper fabric 1: recycled polyester fiber - Upper fabric 2: 95% recycled polyester, 5% recycled Spandex elastane - Lining fabric: recycled polyester - Laces: recycled polyester - Insoles: 98% recycled polyurethane