The Only Motorcycle Bag That Expands to Fit Your Helmet, Gear & More — Waterproof & Road-Ready Tired of strapping a sweaty backpack to your shoulders or fighting with bags that leak in heavy rain? This dual-use tail bag solves it all. Mount it securely to your rear seat in minutes, stash your helmet, jacket, and touring gear, then convert it into a backpack when you’re off the bike. ✔ Expands from  24L to 38L — fits a full-face helmet, gloves, tools & more✔ Double waterproof protection — rain cover + waterproof fabric✔ Quick 4-step install — secure in under 5 minutes, stays stable at speed✔ Convertible design — tail bag on the bike, backpack off it✔ Reflective safety strips — stay visible up to 500 ft at night Why Riders Love It “Fits my helmet and still has space for touring gear. Looks great on the bike and doubles as a backpack. Highly recommend!” – James R.“Rode through heavy rain and my gear stayed bone dry. The rain cover + waterproof fabric combo is unbeatable.” – Aisha K. Perfect For Daily commutes — stash your helmet, laptop, or work gear Weekend tours — carry clothing, gloves & rain gear All-weather riding — proven waterproofing keeps gear safe Night rides — reflective strips keep you visible & safer