Come and see our amazing products. This fanny pack is made out of polyester waterproof material. The back is mesh with breathable design, quick drying and not stuffy. With a headphone jack. an adjustable elastic running belt. Customize your logo. The size of the fanny pack is 13.77"L x 3.14"Wx4.73"H Pls confirm further with us if any query about packing info, inventory status and time schedule.