Made of waterproof neoprene, so the runners belt is very soft and breathable. Twin Fanny Packs Set featuring an open zippered main pocket, two side pockets with bottle holder for drinking during your sports (including a pair of kettles), making it a great accessory for jogging or any other outdoor activity. The side pockets with lanyard design for fixing number card. It has professional reflective strips, a great option for nighttime walks to remain visible.