Muck Boot Excursion Pro Mid-Height Men's Rubber Boot Leather Rubber sole Shaft measures approximately 7" from arch Boot opening measures approximately 12" around 4 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 Anti-microbial XpressCool fabric lining pulls moisture away from skin to keep feet cool and dry in warm weather; comfort rated from 40 F to 95 F (4 C to 35 C) EVA midsole for lightweight support and cushioning; etc Sockliner reduces friction and heat build up Lightweight rubber pod EVA outsole offers excellent traction performance and is resistant to oils, mud and chemicals High-grade rubber exterior makes for a 100% waterproof boot; rear pull loops for easy on/off