Feature: Phiten's New Aqua Titanium Waist Belts are printed and permeated with Micro-sized Titanium balls on the reverse side to maximize the effectiveness and to help ease the tension and pain from your soar muscles. It's great for support and it's the dry fit type. | Material: MAIN BODY: Polyester 86%, Plyurethane 14% ADJUSTMENT BELT: Outside Layer: Nylon 100% Inside Layer: Polyester 100% | 47 3/16 cm