Versatile cycling use: suitable for cycling, mountain biking, and commuting Lightweight and durable: easy to install and disassemble; a multifunctional storage bag that can hold items Target audience: designed for bicycle enthusiasts and cyclists, including long pole cycling Protective durability: the two sides of the Duricrust are made of ethylene vinyl acetate copolymer components that are wear resistant and pressure resistant, protecting bicycle accessories from damage Material and performance: EVA copolymer construction provides wear and pressure resistance while protecting your gear Size and compatibility: not specified in the description; compatibility may vary by bicycle Use scenarios: Daily commute: keep phone, wallet, keys and other essentials within easy reach Trail or mountain biking: the EVA sides help shield bike accessories from damage during rough terrain Short trips or errands: quickly install or remove the bag to carry items conveniently