Walmart offers the Ozark Trail 10-Degree Thinsulate Packable Sleeping Bag in Blue/Lime, model no. TKS-ARM010C, for $34.77. Opt for site-to-store pickup to dodge the $4.97 shipping fee. That's the lowest price we could find by $5. It's extendable to accommodate taller adults and features a stuff sack backpack with adjustable straps, mattress binder, and waterproof zip bag.