SBS water resistance zipper Quick release magnetic snap, one hand opening and closing Retractable waterproof TPU handle, firm and scratch resistant (commonly used in car trailer ropes) Water-resistant material Two compartment zipper design, organizer your accessories well Two way expansion of water cup position, easily storage Front Pocket with elastic keychain inside, it's convenient. Big capacity to organise cables, cell phone, ipad mini, etc. Foldable section for bottle/ umbrella