Teva - Terra Fi 2 (Rhythm Aqua) - Women's: Technology for support and cushioning for comfort, the Terra-Fi is proven performance for use in water, on land, or wherever adventure takes you. Updated for 2006. Patented Universal Strapping System. Fully adjustable, padded heel. Microban zinc based anti-microbial protection. Encapsulated Shoc Pad in the heel cup evenly transfers the energy of impact throughout the footbed and away from the heel. Compression molded EVA midsole. Patented, dual-density midfoot shank provides superior comfort. Original, non-marking Spider Rubber outsole.