Our vision behind the design of the Sera Blanket was to create a weighted blanket that is customizable and washable. Weighted blankets are a substantial investment, and we want to help make your investment last! For optimal comfort and therapeutic quality, your blanket should be 10% of your body weight plus one pound. Other weighted blanket makers require you to choose between a 10, 15 or 20 pound blanket, but with a Sera Blanket, you can start with 11 pounds, and if that is not quite enough weight for you more weighted strips can be added. Lastly, we wanted the blanket to be easy to launder. Simply remove all your weighted strips and wash the cover. It's like washing a set of sheets. So simple and easy.