Mephisto RIENZO is a lightweight lace up shoe in a soft chestnut leather with contrasting stitching. Leather lined with a leather insole which can be removed. The shoe includes Mephisto's Air Jet system which helps to circulate air around your feet as you walk keeping them cool and fresh. They have a 100% natural rubber sole which a shock absorbing system that helps to relieve your joints and back from the jarring you get when you walk.