Combining Tencel, cotton, and silk, this unique sheet set from Pure Parima received the highest softness score in our blinded softness test. With a fully elasticized and adjustable fitted sheet, it can fit beds from 10 to 22 inches tall. TESTING RESULTS: When Lab analysts took these sheets out of the dryer, they proved to be wrinkle-resistant with a sleek, smooth look. Silky materials can often slip off beds, but testers especially liked the stay-put fitted sheet. All testers called this sheet set "luxurious" and highlighted the satiny feel with top comfort scores.