★ embedded airball to insoles for slippers, reflexology slippers ★ different parts reduce the pressure points by each color. From the top image ★ left yellow oak, second is the Arch of the foot airball embedded. ★ left second, Brown is in the ball of the foot airball embedded. ★ Middle, blue is located at the base of the thumb is embedded airball. ★ right from second, moss green, on the heels of airbag embedded. ★ right from first the bricks are mainly airball embedded.