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 3Mreflective strips and attachable rear light MOLLEcompatible strap add extra safety. Compatible with Topeaks MTX QuickTrack® 2.0 racks, theres even enough room to carry additional gear for your eMTB adventures!COMPARTMENT: One compartment CAPACITY: 26 L / 1590 ci Battery dimension within 42 x 10 x 11 cm / 16.5x 3.9x 4.3INSULATION: Rigid EVA foam MATERIAL: Polyethylene / Engineering grade polymer BOX ATTACHMENT: MTX QuickTrack® 2.0 system with attached side panels and 3 additional hook and loop fasteners / Compatible with TetraRack M2L MAX LOAD: Limited to rack max load rating ADDED FEATURES: Carrying handle, 3M reflective st