Fits securely to the Grizl’s top tube bolt bosses and is perfect for storing battery packs, mobile phones and everyday essentials. Like the Grizl, the pack is lightweight and rugged enough to tackle any terrain. This top tube bag is constructed from an ultralight, waterproof laminate developed for Apidura. It features an innovative magnetic quick-access flip-top opening for fast access and a clear view of the full contents of the bag, while also keeping your belongings dry. A closed-cell foam padding structure protects your frame and electronics from damage on rough terrain and for added convenience, a protected cable port enables charging of devices on the go.