Featuring the same harness system as the H2, but with added 5 liters of cargo space along with a 2.5 liter bladder. The H4 harness pack has enough room to carry snacks, inner tubes, waterproof outerwear or almost anything else you might need on a long ride. With all the weight on your back on every bump. FLY’s exclusive harness system eliminates all that excess bouncing.
Harness type design is specifically engineered to be worn with any of the FLY neck braces by Leatt
