quality and durability Crafted from density polyester fabric for strong tear and abrasion resistance. Built to withstand long rides and harsh weather, with a removable PVC support panel that forms a sturdy internal frame to prevent sagging. Spacious dualcompartment design Dual compartments, each with a 17litre capacity. Individual dimensions: 39 cm (L) x 29 cm (W) x 16 cm (H) per side, for a total capacity of 34 litres. Ample space for helmet, cycling gear, phones, wallets, books, water bottles, tools, snacks, and more. Organised storage Both compartments include removable mesh pockets to neatly store small items such as keys and power banks. An external side pocket accommodates tools of various sizes. Reinforced elastic bungee cord on the provides a practical solution for securing umbrellas, pumps, spare shoes, and similar items. Dual fixation system Quick attachment to the rear bike rack using four strength hanging hooks. Additional reinforcement with two wide hookandloop straps around the base of the rack. This dual fixation keeps the bag secure and stable, with no wobbling or loosening during urban commuting or offroad adventures. Use scenarios Daily urban commuting: carry a helmet, cycling basics, a water bottle, tools, and items with organized compartments for easy access. Weekend rides or bike touring: ample space for clothing layers, snacks, spare shoes, and tools while maintaining a stable, secure fit on the rack. Errands and family rides: external pocket and bungee cord provide quick options for securing larger items like umbrellas or pumps during short trips. Functional highlights Function: large, organized storage for cycling and daily use; sag internal frame for stable load. Compatibility: designed for attachment to standard rear bike racks with four hanging hooks and two hookandloop straps. Size and capacity: 34 litres total capacity; each side 17 litres; dimensions 39×29×16 cm per side. Material and build: density polyester fabric with removable PVC support panel for durability and structure. Performance: secure mounting ensures stability across varied riding conditions, from city streets to offroad paths.