Weighted blankets that provide a cozy, swaddled feeling have been big sellers during the trying days of the pandemic, and a new study verifies that they do provide mental health benefits. Researchers from Sweden’s Karolinska University tested 120 patients with depression, bipolar disorder, anxiety disorder or attention deficit hyperactivity disorder for four weeks. They found that a weighted blanket led to better sleep and reduced fatigue, depression and anxiety, and increased levels of daytime activity. Weighted blankets are comforters with tiny pellets or metal chains woven throughout so that weight is distributed across the body; researchers recommend using a blanket that is about 10 percent of a person’s body weight.