Walmart is selling a $140 pair of king-size cooling pillows for only $27 for the remainder of its deals week

TheStreet aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. When's the last time you replaced your pillow? You know, the one (or two, or three) you sleep with every night? Replacing a mattress is a major investment, but new…