ScubaPro Heavy Duty 6.5 mm BootOVERVIEW Built to handle the tough stuff, with a reinforced toe and heel and a substantial molded rubber sole, the HEAVY DUTY 6. 5MM is both durable and comfortable, making it the ideal wetsuit boot for cold water and harsh conditions. A Diamond Span interior enhances comfort plus improves warmth. Heavy duty nylon 2 sided neoprene ensures comfort and durability. Reinforced toe and heel provide protection against the elements. Heavy duty rubber anti