The All-New Bote Highwater Hitchhiker Black attaches to the Travelink Sling (or just about anything) with two velcro attachment straps. Its also MAGNEPOD compatible, allowing you to secure it to BOTE products with MAGNEPOD attachment points. Plus, the included carry strap allows for multi-wear, hands-free carrying. The patented TRU Zip zipper is fully waterproof, dustrproof, airtight, and submersible (IP67).