Muck Boots Edgewater Ll Multi-Purpose Tall Men's Rubber Boot Synthetic Rubber sole Shaft measures approximately 13.5" from arch Boot opening measures approximately 16" around 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to your foot shape to resist blisters and chafing High-grade rubber exterior provides extra toughness and makes for a 100% waterproof boot Aggressive high-traction waffle outsole improves grip on wet and uneven terrain Reinforcement around the Achilles adds strength and support to a vulnerable area of the foot Angled topline offers increased comfort around the calf; back pull loop aids donning and doffing