Description?The materials of this series are mostly Twill fabric, A Twill fabric is Nylon yarn, which is strong against friction and flexibility, is woven in a high density. ? The bag has one main compartment which is cover with our special water resistant zipper and inner compartment there is also one other zip pocket where you can put you important things. ? Size of bag is 30cm X 14cm X 4.5cm ? Waist Bag is is recommended for a variety of occasions, from daily use to a sub-bag for travel. Although it looks compact, it is a two-layered bag with plenty of storage space. The front layer has divider pockets and clear pockets, which are convenient for storing a smartphone, pass case, etc.