Pottery Barn Belgian Flax Linen Full/Queen Duvet Cover, Flagstone Grey color, New with Tags, Retail $279 Duvet 88”x92” Fits Full or Queen Woven from world’s finest 100% Belgian flax. Prewashed for softness and gets softer with each wash. Lightly textured and cool to the touch, prized for its durability, breathability and lived-in look. Ideal for warm or cool temperatures. Microscopic breaks in the fabric provide a light massaging effect. Standard 100 by Oeko-Tex certified. Tested safe from over 350 harmful substances. Hidden button closure with inner ties that keep insert in place Machine wash.