For walking, running and jogging. Special "heel strike"
cushioning delivers optimum shock absorption for repetitive rear foot
impact.
Sizes:
"1" fits women's shoe 5-6.
"2" fits women's shoe 7-8, men's shoe 6-7.
"3" fits women's shoe 9-10, men's shoe 8-9.
"4" fits men's shoe 10-11.
"5"fits men's shoe 12-13.
"6" fits men's shoe 14-15.