The Adventure Pocket adds additional storage to your Signature Series belt with a zippered secure pocket big enough for a phone, and two stretch stash pockets for gels or other small FEATURES:- Flex Mono Mesh tunnel provides a breathable attachement point for all belts Phone compatible with zip secure pocket Attach to any waist belt for added storage and organization Ultra lightweight system Reflective accents for visibility MATERIALS:- 100% silicone coated nylon 82% nylon 12% spandex