Walmart offers the Disney Frozen Sling Bag Slumber Set Nap Mat, model no. WK318707, for $9.98. Opt for Site-to-Store pickup to avoid the $4.97 shipping charge. That's $5 under our November mention and the lowest total price we've seen. (It's a low today by $9.) This sleeping bag measures 52" x 30" x 3" and comes with a sling carry bag.