The running belt Material is made of lycra fabric,very soft and breathable and ultra light,the materials are totally harmless to body and environment.The running belts can directly touch the body.Fanny pack for runners have 2 additional inner small pocket especially designed to hold and separate your keys to prevent scratching of your phone's screen or other valuables.It also have 2 big pockets for smartphone, passport, credit card, cash or sports gels. Fitted with a special earphone hole for music enjoying during exercise.This running fanny pack adopts ultra-light design but with special earphone hole and reflective strip,fanny belt bounce free and will not ride up, keep you and your smartphone safe.