NWT Gravity Weighted Blanket Queen/King 35 lb Gravity is the only weighted blanket scientifically proven to improve sleep quality by an independent study of 1,000 nights of sleep (SleepScore). 76% of people using the Gravity Blanket reported falling asleep faster and feeling more rested upon waking up in the morning. 72% of participants reported better, more restful sleep. 54.7% reported feeling less anxious and stressed from using the Gravity Blanket. -premium micro-plush duvet cover and an inner weighted piece containing fine-grade glass beads -Precise gridded stitching ensures the glass beads remain uniformly distributed -The weighted inner is secured to the duvet cover via ties and elastic-button connectors and with our upgraded zipper fastening system -Cover is machine washable (wash in cold water, tumble dry on low)