6pm.com is proud to offer the Kalso Earth - Exer-Flip (Blue) - Footwear: Forget the gym! The Exer-Flip sandal helps you burn more calories with every step you take. ; Leather upper with hook-and-loop strap for a secure and custom fit. ; Anatomic arch support maximizes the effectiveness of the heel design to promote a natural walking motion. ; Form-fitting footbed with BioFoam™ cushioning molds to the shape of the foot to displace and absorb shock with each step. ; Kalsø® Negative Heel Technology® positions the toes 3.7° higher than the heels to help strengthen and tone the body. ; Ultra-lightweight outsole absorbs and displaces shock to reduce fatigue.