Kangoo Jumps KJ XR3 Special Edition, Black and Black, size Medium Womens 7,8,9 Mens 9,10,11 Burns 2x the calories, workout 1/2 the time! World's Lowest Impact Shoe (reduces joint impact 80%!) Full body workout: legs, core & arms Makes any workout crazy euphoric fun (run, dance, jump, train) Great for women - Kegal effect with every step & strengthens lower abs