Yes @Josephine and I'd be remiss in not mentioning what I've read since I suggested it to Zauberfloate, or questioned whether the hospital her mom is in uses them. Not sure if you've read, but the maker, 3M was battling lawsuits from orthopedic surgery patients who maintained the company's popular "Bair Hugger" warming blankets used to keep people warm, circulated contaminants and caused debilitating deep joint infections. However, just three days ago 3M declared a legal victory after a federal judge dismissed lawsuits from more than 5000 plaintiffs who said 3M's Bair Hugger warming device caused their post surgical infections. The article can readily be accessed online. Interesting! After reading that, just to be on the safe side, I think I'd go for the cheaper space blanket...given the option.