Oasis Women's Leela Lace-Up Oxford Shoes Trek-Dry lining has natural antimicrobial properties to encourage a healthy, dry foot environment. Natural Skintex lining treatment helps keep skin smooth and soft. Oasis Grasp rubber outsole absorbs shock and resists slips for a steady walk. Full-grain leather upper, Trek-Dry (forefoot) and pigskin leather (collar) upper lining... Polyester mesh sockliner, removable EVA insole with EVA spacer, rubber outsole, etc.