The Gravity Blanket wasn't some newfangled invention when it debuted on Kickstarter two years ago; weighted blankets, also known as anxiety blankets, have been used as a form of therapy for people with autism and other mental health conditions since the late '90s. But when Gravity's campaign on the fundraising site took off -- as in, "surpassed its original goal by more than $4.7 million" -- it catapulted weighted blankets into mainstream popularity as a self-care and sleep aid.And that, kids, is the reason why everyone and their dog has a weighted blanket on their bed these days. SEE ALSO: Yes, you really do need a weighted blanket -- and these ones are the bestIf you haven't jumped on the weighted blanket bandwagon yet, you really should: They mimic the comforting feeling of a warm embrace to relieve insomnia and anxiety -- or so many manufacturers claim. Just find one that's about 10% of your total body weight and cover yourself with it while you rest to reap the (purported) benefits. Here's the thing about weighted blankets, though: They're gosh darn expensive for something that's basically just a pellet-filled comforter. That's not to say some aren't worth the money: The Gravity Blanket is one of our favorite picks, and it costs a whopping $249. But for all you bargain hunters out there, you can get the following weighted blankets on sale right now: Hush Classic Weighted Blanket Hush's luxe weighted blanket is filled with glass microbeads and comes with a dark gray duvet cover made with super-soft "Minky" microfiber threading. Choose between two sizes -- twin or queen -- and three different weights: 15, 20, or 25 pounds.You'd normally pay $229 for a twin-sized Huxe Classic blanket and $269 for a queen, but both sizes are on sale now for just $199 and $219, respectively. Hush Classic Weighted Blanket with Duvet Cover -- $199 See Details Serenity Weighted BlanketBilled as the world's first plant-based weighted blanket, the Serenity features a white duvet cover made from 100 percent organic cotton and a hand-filled baffle box construction that evenly distributes the recycled down alternative fill and plant-based resin beads with which it's filled. Choose from three different weights: 15, 20, or 25 pounds.Score a Serenity weighted blanket starting at just $199 (a $209 value). Serenity Weighted Blanket -- $199 See Details Puro Down Weighted BlanketPuro Down's 100 percent cotton weighted blanket is dotted with tiny compartments filled with glass beads that, when worn, stimulate the stress-relieving effects of deep pressure touch therapy.The Puro comes in light gray and dark gray, and both varieties are on sale now starting at just $68.99 apiece. Depending on the weight of your blanket -- choose from 7, 10, 12, 15, or 20 pounds -- you'll save anywhere from 19% to 28%. (The heavier the blanket, the bigger the discount.) Puro Down Light Gray Weighted Blanket -- $68.99 See Details Bibb Home Weighted BlanketSuitable for all types of weather, the Bibb Home weighted blanket features a 2-in-1 design with a 100 percent micro mink cover that can be removed for cooler sleeping. It comes in two sizes -- small (48 inches by 72 inches) and large (60 inches by 80 inches) -- and three weights. Choose from 10, 15, and 17 pounds.Get a Bibb Home weighted blanket on sale starting at just $95 and save up to 31%. Bibb Home 10 Lb Weighted Blanket and Mink Cover -- $95 See Details