The biggest technological upgrade in the jumping stilt industry - in 8 years!Why are the CZs so much better than any other jumping stilt? For years, 99% of all jumping stilts were made by (2) authorized global manufacturers. Most parts on ALL jumping stilts were virtually the same. (Look - they are!) Until now!!! The Air-Trekker CZs now trump all existing jumping stilts models in quality and performance. Nothing is even close. Literally one of the coolest pieces of sporting equipment available to mankind! The lightest, most advanced jumping stilts on the planet�..CZ-A ADULT (also see the new Air-Trekker CZ-A EXTREME Model listed separately).Jump up to 3-5 meters high. Run over 20 miles per hour.The newest technology, at the best prices on the globe.New Spring Manufacturing Technology � Hi-Tech nanometer: delivers small volume, light weight, ultra-responsive with good elasticity.Durable foam knee bar with NEW pr