The unique DynaPack is the perfect solution for those who don't want a handlebar bag or full QuickTrack system but occasionally need more capacity than an under seat bag. Constructed of molded 600 denier for a sleek, aerodynamic profile, the DynaPack easily holds tools, inner tubes and other essentials with room to spare for a light rain jacket, small picnic lunch or anything else you might need. A light weight aluminum exo-frame holds the DynaPack securely while a quick release seatpost mount makes installation and removal a breeze.