Bearaby The Tree Napper New colors include maple, mahogany, cocoa, driftwood, and iron bark - warm undertones of oats, mustard, burgundy, a light brown and a rich light blue, respectively. The Tree Napper is Made from durable natural eucalyptus fibers which are especially suitable for hot sleepers: the blanket will keep your temperature very comfortable for sleeping, thanks to the cooling properties of its material. The weighted aspect of it, meanwhile, has been shown to reduce cortisol (stress!) And increase blood pressure.melatonin (sleep!) and serotonin (happiness!), and the weight (your choice of 15, 20 or 25 pounds) is evenly distributed over the knitting material for maximum benefits. Some of Bearaby's waitlists have grown to 80,000 people, so don't fall asleep and be sure to pick up a weighted blanket before the cold and the winds start to blow.