The Ski~Mojo support system for skiing is a device that uses spring recoil technology to take up to a third of the strain off the legs and knees by providing kinetic energy to assist leg extension, enabling you to ski for longer.
The Ski~Mojo works like an exoskeleton for the legs consisting of a lightweight comfortable harness with neoprene supports containing powerful springs. Worn under ski pants the Ski~Mojo is so neat and discreet that no-one would know it is being worn, which is why some skiers don’t reveal their secret weapon.
See the recent review by the Ski-Guru here: https://www.the-ski-guru.com/2019/05/15/old-knees-not-mean-no-more-skiing/?fbclid=IwAR0J7idH544nhk_pGVhzmcs148oZiIystfOVY1S8BBcnJ-sl5algN2EUONc