Walmart has Ozark Trail 30F Synthetic Mummy Sleeping Bag on sale for $16.16. Select free store pickup where available, otherwise shipping is free on orders of $35 or more.
Note: You may be able to select store pickup during checkout even if the product page indicates that store pickup is not available. Availability for pickup will vary by location.
Walmart also has Ozark Trail 30F Camo Mummy Sleeping Bag on sale for $22.04. Shipping is free on orders of $35 or more.