Walmart has the Ozark Trail Himont 40F Climatech Mummy Sleeping Bag for only $20.97! (Reg. $35) The Ozark Trail Himont 40F Mummy Style Climatech Sleeping Bag is perfect for cool weather camping. The cozy mummy shape helps retain heat during cold fall nights. The mummy-shaped design with neck baffle and zipper baffle provides optimal thermal insulation and is approved for temperatures as low as 20 degrees Fahrenheit. It protects your head and shoulders from the elements and provides extra warmth and comfort while sleeping outdoors.