A: Yes, we highly recommended you wash the bamboo sheets and duvet covers before use. Our linens have been oversized to allow for the first-time shrinkage that occurs when you wash and dry them. Bamboo can shrink up to 4% at the first wash, and you may think the Fitted Sheet is too big if you don’t wash them first. Zip the Duvet closed prior to washing to maintain the integrity of the zipper. The buttoned duvets have an extra button sewn inside the bottom of the duvet. This allows you to replace any that fall off or are lost.