These sheets are made of 100% finely spun European flax linen. The unique weave of linen makes it breathable, making it perfect for summer nights. It is incredibly durable and gets softer and more comfy over time. It is woven with a one-over, one-under technique for an airy, luxurious feel. The flat sheet and pillowcases feature a double hem stitch. The fitted sheet is made with elastic on all four sides, and a 16-inch deep pocket for even the tallest mattress. All sets include a fitted sheet, flat sheet and two pillowcases (one for a twin). Made in India.