REI Garage offers the Therm-a-Rest Camp n' Carry 48-Liter Stuff Sack in Blue for $21.73. Opt for in-store pickup to avoid the $5.99 shipping charge. That's $8 off and the lowest price we could find. It measures 10-1/2" x 34" and features a full-length flap opening with twin side-release buckles, shoulder strap, and zippered end pocket.