The Helios Dog Freestyle 3-in-1 Explorer Convertible Backpack, Harness and Leash is a Backpack that Doubles as a Chest Compression Harness with an Included Leash. This Only-of-its-kind 3-in-1 Backpack, Harness and Leash features a Backpack with a Chest Compressive Harness that completely ejects from the Backpack that enables the user to remove the backpack as the user wishes. The Backpack features a special DUPONT Outershell that is entirely Waterproof including the zippers. The Outershell of the Backpack further features reflective-tubed lining all around with added reflective memorized stitching along the DUPONT Nylon Outershell for premium protection during those night strolls. The Harness portion features both a Neoprene and Waterproof DUPONT Outershell with a breathable and visible cross-stitched inner mesh Outer and Inner lining for optimum comfort. The Chest Compression Harness is also fully adjustable and places little-to-no stress at the sternum area of the pets body for a comfortable pull. Comes with a matching accented Nylon leash with a Stainless steel swivel hook. Features Rubberized Stitching and Embroidery at the Leash, Backpack and Harness. Get Outdoors with Helios Dog! Available in Multiple Sizes and Colors. SIZING GUIDE (INCHES):BACKPACK/HARNESS: SMALL: BACK: 7.48, CHEST: 17.7 - 22.8, NECK: 15.7 - 18.8MEDIUM: BACK: 8.26, CHEST: 21.6 - 27.5, NECK: 19.7 - 24.4LARGE: BACK: 9.1, CHEST: 24.4 - 33.8, NECK: 26.7 - 34.4LEASH DIMENSIONS: SMALL: LENGTH 4 FEET, THICKNESS: 0.27 InMEDIUM: LENGTH 4 FEET, THICKNESS: 0.35 InLARGE: LENGTH 4 FEET, THICKNESS: 0.51 In Features: Travel Size, Moisture Wicking Pet Intended For: Dog Measurements: 48 Length/Inches, 17.25 Height/Inches, 20.25 Width/Inches Base Material: 100% Nylon Care: Wipe Clean, Machine Wash Country of Origin: Imported