Designed and developed with 2x IronMan(R) World Champion Tim DeBoom, the new isoTransition was built to perform when it counts - on race day. The quick-pull lacing system and self-draining midsole are designed to help you shave valuable minutes for your next PR. The breathable, Seamless Upper provides such amazing out-of-the-box barefoot comfort, you'll swear that someone is tickling your little piggies. Amen. 1:1 Seamless Upper creates an unparalleled fit with a seam-free interior. 1:1 360 Lacing anatomically conforms to the foot for a tailored fit regardless of foot shape. Quick lacing system for easy entry and fast transition times.
NEW 1:1 Energy Foam cushions the forefoot upon impact and then returns energy back to the runner
Blown Rubber & high durability EVA outsole combine for great cushioning and weight savings
Drainage holes in midsole allow water and sweat to escape
NEW quick draining Ortholite� sockliner for amazing step-in comfort and long-lasting cushioning