Amazon is selling a $70 mattress topper for $35, and shoppers call it 'supportive, yet very soft'

TheStreet aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. There are plenty of ways to upgrade a cheap mattress. First, you can spruce it up with a great set of bedsheets. If you're looking to add another level of comfort,…