Built to go further! The E-Xplorer TrunkBag is an eBike specific spare battery carrier made of rigid EVA foam and Polyethylene providing structure, excellent impact absorption, and water repellency. In addition to the expandable top section, the side panels expand to full panniers maximizing capacity. The grip straps secure a spare battery in place while 3MÃƒÂ”ÃƒÂ¤ÃƒÂ³ reflective strips and attachable rear light MOLLEcompatible strap add extra safety. Compatible with TopeakÃƒÂ”ÃƒÂ‡ÃƒÂ–s MTX QuickTrackÃ¢Â”Â¬Ã‚Â« 2.0 racks, thereÃƒÂ”ÃƒÂ‡ÃƒÂ–s even enough room to carry additional gear for your eMTB adventures!