Best For: Modular Bino Harness System This Hydration Set includes the following PRO G3 Bino Harness System components: -PRO G3 Bino Harness-Hydration Rig-Platypus 3L Hoser-Accessory Pocket Featuring our patent-pending Rail-Lock™ connection system, its modularity allows you to swap accessories in or out for versatility on any hunt. Choose the size of the bino harness based off your binocular’s height, while the shoulder straps are fully adjustable to accommodate a broad size range of users.