Installs and removes in seconds when used with a Trek or Bontrager Interchange- compatible rack. Deluxe Plus feature bombproof ballistic materials and elastic mesh top pocket. Deluxe Plus has larger expandable side panniers. All bags feature 270+ degree reflective top flap and expandable top. Deluxe plus now include stow-able and expandable rain covers. Capacity: 750-1,750cu.in. (12,290-28,677cc).