Sleep Better Iso-Cool Memory Foam Pillow for $29.88. Shipping is free on orders over $35. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for your reference. Alternatively, it is available at Walmart for $29.88 with free shipping on orders over $35. The pillow is made of isotonic visco-elastic memory foam with 5-lb. density and includes a 300-thread count cotton zipper cover.