Rubber sole?? Lace-up system for a quick secure fit. Soft textile lining provides a great next-to-skin sensation. Ultra-light and breathable shoes.?? Drainage Holes: Anti-slip rubber sole with multiple holes on each bottom to ensure proper water flow that creates a cooler and healthier environment for your feet to thrive.?? Lining: Inside with honeycomb insoles, comfortable and breathable.?? Water grip outsole provides excellent traction on wet and slippery conditions.??These are great for beach, swimming, surfing, jogging, hiking, working out, beach volleyball, fishing, snorkeling etc.