To buy: $41 (was $80); amazon.com. The breathable 250-thread-count sheet set comes with a fitted sheet, a flat sheet, and two pillowcases. It also has OEKO-TEX Standard 100 certification, which means it was tested for harmful substances and is safe for sensitive skin. The bamboo fiber is even softer than cotton and has a luxurious appearance despite its affordable price, and the sheets have a subtle weight to them that’s great for lulling you to sleep. Because the sheets can wrinkle, shoppers advise using the wrinkle setting on your dryer. “Sleeping on them makes my sad little apartment bedroom feel like I’m in a seaside cottage with the patio doors open and an ocean breeze wafting over me. They are that good,” writes another. “After a week sleeping on these, I think everything else is going to feel like crumpled up tinfoil.” Up your cool factor while the bamboo sheets are on sale for just $41.