[bball08]

yes jumpsoles are confortable they strap on over your shoes and give the calves a great workout, when you buy the product it comes with a video and instruction booklet that contains exercises to perform in them each exercise makes different parts of the legs stronger and they work trust me there are several exercises to perform like lunges, skip jumps, step ups, rapid fire step ups, and many more check out the site it will tell you alot of details about the product and stories of people who have used them the site is www.jumpusa.com