... USA, England, France, Germany, Spain and Italy six patent countries. OEM brands include Fly Jumper, Up Wing, Powerstrider, Jolly Jumper, Pro- ... kids two models.Compare with new model and old one, have difference and improvement as follow.1) Unique Spring, Global exclusive first, ... made of antiskid and durable PU rubber, thus increase the life of rubber and bounce height of stilts. Up Wing Sports Safety ...