REI Garage offers the Sea to Summit 40-Liter Ultra-Sil Duffle Bag in Black or Yellow for $21.73. Choose in-store pickup to avoid the $5.99 shipping fee. That's tied with our July mention and the lowest price we could find now by $23. This 2.8-oz. bag can be packed for storage in the included stuff sack and expands to 22" x 11" x 10".