Sperry Top-Sider Men's ASV Classic Boating Shoe,Tan,9 M US 100% Leather Rubber sole Features proprietary technology with anti-shock and vibration properties Absorbs and disperses 40% of shock vibration from power boating The solution for fatigue and back strain caused from power boating and wave impact Unique upper design provides flexibility and enhanced agility Built in internal drainage removing water from around the foot for better comfort