According to National Geographic, the first known mattress dates back to around 77,000 years ago. It was discovered in South Africa in 2011 and was made of reeds and rushes. Researchers believe that a ‘top sheet’ made of insect-repelling greenery was used to help ward off the unwanted night-time visitors.

Especially suited to hot climates, linen sheets are among the most expensive options available, but they will last for decades.

Twill:Twill is a style of weave which uses diagonal parallel ribs, which are created by passing the weft thread over one or more warp threads and then passing it under two or more warp threads. This creates a visual diagonal line pattern on the fabric, as well as making the fabric sturdy and drape nicely.

However, the one aspect of fit you may want to consider is pocket depth. Fitted sheets can vary in how deep the pockets are, since mattress heights are not standardized like length and width. If your mattress is more than 10 inches tall, you may want to consider looking specifically for deep-pocket fitted sheets. We recommend the pockets be a few inches larger than the height of your bed — if your bed is 15 inches tall, look for 16 to 17 inch pockets.