Key benefits - Flexible loading capacity - 30L universal main compartment with adjustable compression straps to stabilise heavy loads - Ideal for bicycle lock or tool bag on city trips and multi-day tours - Cleverly protected compartments - Structured compartment division with flexible brackets to securely fix items - Multi-layer dividers create protected zones for smartphones, cameras and navigation devices - Expandable transport system - Highly flexible belt systems fix equipment such as water bottles, rain covers and outdoor clothing - Dynamic capacity expansion enabled by smart room division while releasing interior space - Enhanced visibility and safety - All-round reflective strips provide continuous visibility from evening to morning - Reliable warning function for following traffic strengthens bike protection in any light Use scenarios - City bike commute - Carry a bicycle lock or tool bag in the 30L main compartment - Keep valuables in protected zones for quick access to smartphone, navigation device, or camera - Reflective strips improve visibility in low light conditions - Weekend or multi-day cycling tour - Expand capacity to accommodate extra clothing, water bottles, and rain gear - Use smart room division to organise gear without sacrificing interior space - Travel with electronics and accessories - Use multi-layer dividers to separate smartphone, camera and navigation devices - Secure cables and small components with the adjustable compression system Specifications and features at a glance - Capacity: 30L main compartment with adjustable compression straps - Loading system: universal and flexible to stabilise heavy loads - Internal organisation: structured compartments with flexible brackets and multi-layer dividers - Expansion: dynamic capacity expansion through smart room division while freeing interior space - Security and safety: all-round reflective strips for high visibility; warning function for following traffic Material and performance notes - Designed for practical reuse in city and touring scenarios - Built to securely fix items and maintain organisation during movement - Reflective design enhances safety in low light and night conditions This description preserves the original product’s functions, specifications, and use cases while presenting them in a clear, customer-focused format.