Water repellant trunk bag with expandable storage that expands from 7L to 15L. Expandable main compartment with striking red lining for easy item recognition. Equipped with Basil`s Universal UBS system and compatible with all rack types. Reflective accents increase visibility and improve safety when cylcing after dark. Dual side pockets for quick access items and organization. Removable shoulder straps increases portability while using it off the bike