Prized for its warmth, flannel is primarily popular as a winter material. You can assess how thick and heavy a flannel sheet is by the GSM, or grams per square meter. A GSM of 130 to 135 is considered lightweight, 140 to 150 is considered midweight, and 160 or more is considered heavyweight.

And speaking of looks, linen sheets have increased in popularity in recent years because they are inherently more boho chic than cotton. Stylists and the Instagram-obsessed love them for their deep texture and camera-friendly looks. They ooze that effortless je ne sais quoi that people associate with French style — unpretentious but impossibly chic.
7. Bamboo

What Is A Fitted Sheet?