50 cotton 50 polyester percale bed sheets

Woven satin sheets, as the name suggests, are crafted through a meticulous weaving process using fine threads of either natural or synthetic fibers. Unlike their knitted counterparts, they are created by interlacing yarns horizontally and vertically, resulting in a more durable and lustrous fabric. The primary material used in woven satin is usually polyester, although silk satin sheets are highly sought after for their premium feel and unparalleled sheen.

...

Tencel™ is a branded material for Lyocell, a product of wood pulp found in certain trees — particularly fast-growing eucalyptus. This environmentally friendly material is wrinkle-resistant and is produced using a closed-loop process, so any waste created while making the material is recycled and reused. 
Soft, smooth, and hypoallergenic, Tencel™ is a great choice for eco-conscious consumers. However, keep in mind that it’s not quite as breathable as cotton or linen.

...
...