Air-Trekkers Adult Jumping Stilts BW Extreme 1 Pair of Spring Loaded Jump Stilts are for Men Flips, Tricks, Exercise, Fitness, Cardio Bounce Shoes with Protection Pads & Knee Support BIONIC-LIKE DESIGN: High performance carbon fiber springs. Leg Cuff & Wide Velcro binding straps for added safety. Certification: SGS and CE. RUN, JUMP, FLIP: Run Faster Jump Higher. Try parkour, free running, and acrobatic flips & tricks. Hands free POGO STICKS on each leg! EXERCISE & FITNESS: Cardio, core body strength. Arouses athletic skills ideal for agility, coordination, balance, and explosive force. ONLY USA LICENSED BRAND: Air Trekkers brand is the only USA royalty paying licensee for German patent holder, Mr. Boeck. Quality parts and service for 11 years in the USA.