THE FANNY PACK AS A SPORT BELT IS MADE OF NEOPRENE. THE WATERPROOF MATERIAL PROTECTS YOUR THINGS FROM WATER AND SWEAT. IT IS GOOD FOR OUTDOOR, SPORTS. THE MINI SPORT BELT IS A POUCH BELT, DESIGNED NOT TO BOUNCE DURING FITNESS ACTIVITY. THE POUCH IS SMALL, DURABLE AND LIGHTWEIGHT, YET IT CAN FIT A CELLPHONE, MP3 AND KEYS, EVEN YOU CAN USE THE PHONE WHEN THE PHONE IS PACKETED. 32 5/16" L X 3" W X 3/8" H