Silk sheets are perceived by most people as the most luxurious option available. Silk sheets are amazingly cool and rich. They are a great option for anyone who suffers from allergies throughout the year because they are naturally hypoallergenic. They are usually much more expensive than other types of sheets because they are made from a fibre produced by silkworms and require more delicate care. However, there are people who find them difficult and slippery to sleep on.