MIK Trunk Bag Big Daddy Bicycle Rack Bag (works only with MIK Rack - not Included)BiKASE BIG DADDY Trunk Bag with Panniers offers simple and secure on bike storage that's easy to install and remove without the need for tools. It has multiple pockets to keep you organized, with built in expandability, built in panniers for extra carrying capabilities, a durable design with reflective materials, and rain cover to keep your gear safe in all conditions. Added sealed liner that can hold ice and a rear oversized bottle holder. RF seam