Pottery Barn describes as: Woven from fine Belgian flax, our Linen Diamond Quilt has a cool, fresh feel. Linen woven from 100% Belgian flax. Breathable Belgian flax linen is ideal for warm or cool temperatures, and its durability lets you love it for years. Soft and cool to the touch. Microscopic breaks in the fabric provide a light massaging effect, and high absorbency meaning they'll always feel fresh and cool. Quilted sham features an envelope closure. 150 gsm; 100% polyester fill. Fully reversible to same as front. Quilt, sham and insert sold separately. Oeko-Tex certified, the definitive mark of excellence for products that are healthy for you. Pre-washed for a super soft hand feel. Machine wash. Imported.