MIHUNTER Motorcycle Tail Bag — 16.9in Expandable Waterproof Seat Bag with Backpack Straps

MIHUNTER's Motorcycle Tail Bag is a waterproof, expandable seat bag that converts into a backpack and includes reflective detailing, rain cover, straps, and a cargo net for secure, versatile storage on and off your bike.

Whether you're commuting, touring, or running errands, this dual-use bag is designed to keep gear dry, organized, and easy to access. Built from 1680D Oxford cloth with waterproof layers and an EVA structure, the bag resists tears and holds shape while offering an expandable bottom section to increase capacity. It arrives with shoulder straps, buckle straps, a rain cover, and a cargo net, ready to mount on most motorcycles or be carried as a backpack.

How much will the seat bag hold and how does expansion work?

The MIHUNTER tail bag has two capacity profiles: a compact standard size and an expanded height for larger loads. A zippered expansion panel increases internal volume without sacrificing stability when mounted on the bike.

• Standard dimensions: 16.9" L x 11.8" W x 6.7" H
• Expanded dimensions: 16.9" L x 11.8" W x 11.8" H
• Expandable bottom section for extra storage
• Lightweight construction at approximately 1.1 kg

Can this bag handle wet weather and rough roads?

The bag combines a waterproof outer layer with a provided rain cover and water-resistant zippers to protect contents during sudden showers or wet rides. The 1680D Oxford fabric and EVA reinforcement improve tear resistance and durability on bumpy roads.

• Waterproof cloth plus included rain cover for full wet-weather protection
• 1680D Oxford outer fabric for abrasion and tear resistance
• EVA inner structure keeps shape and protects contents
• Two-way zipper for secure closure and convenient access

How does it attach to the motorcycle and convert to a backpack?

MIHUNTER includes multiple mounting and carrying options so you can fasten the bag to a variety of motorcycles or wear it on your back. Two buckle straps and an extra cargo net secure the bag to a seat or rack, while built-in shoulder straps transform it into a hands-free backpack.

• Two buckle straps for stable seat or luggage rack attachment
• Extra motorcycle cargo net for added load security
• Detachable shoulder straps convert it to a backpack in seconds
• Reflective straps for visibility while riding at night

What organization and practical features does the bag offer?

Designed for riders who carry helmets, kit, or commuter essentials, the bag includes internal space and an expandable layout to accommodate clothing, shoes, tools, or electronics. The interior lining is soft and breathable to reduce abrasion against items stored inside.

• Soft oxford-lined interior to protect stored gear
• Large main compartment fits helmets, jackets, shoes, and more
• Two-way zippers let you access items from multiple angles
• Reflective front straps add passive safety on night rides

Who is this for: Riders who need a rugged, weather-ready cargo solution that adapts between mounted luggage and a carryable backpack. MIHUNTER's Motorcycle Tail Bag suits commuters, weekend tourers, and urban riders who want durable fabric, waterproof coverage, visible safety features, and flexible capacity for helmets, clothing, and daily essentials.