Summersalt's ribbed modal fabric is everything you'd want to lounge in. It's lightweight, silky soft, and has just enough spandex to create a stretchy, drapey fit. Summersalt has multiple pieces made out of this cozy fabric, and they come in four colors and patterns so you can mix and match the ones you like best. Richer Poorer is all about the basics. Everything is made with high-quality materials and has that effortlessly cool vibe you'd expect from an LA-based brand. Many women on our team are obsessed with the Fleece Sweatshirt, which coordinates with a matching pair of sweatpants. Both pieces are softened with silicone, so they have a cozy, worn-in feel from the minute you put them on. The pants and crewneck both have a classic look that you'll feel comfortable wearing in or out of the house, and the fleece is super soft without being too heavy.Everything from Tommy John is made with the 3 F's in mind: fabric, fit, and function. Ultimately, that means you get high-quality, innovative fabrics that are supremely comfortable. Tommy John is on the pricier side, but we think it's worth every penny. If you want something lightweight, this set will be your go-to. The material is stretchy, swingy, and soft, making it comfy to lounge in for hours. If you want something a bit heavier, Tommy John has plenty of sweatpant sets too. Outerknown's sweatpants and hoodies are pricier than most of the other pairs on this list, but the brand is committed to doing better for the planet and factory workers, which helps us justify the cost. The Solstice Cozy Hoodie and Solstice Sweatpants are made in a Fair Trade Certified facility with organic cotton. Both pieces have a comfortable, casual oversized fit that looks good whether you're chilling on the couch or running errands outside. Our senior editor is obsessed with the sweatsuit and loves the terrycloth material, which helps regulate body temperature better than a heavy fleece — so it's soft and warm while still feeling relatively lightweight. Lively got its start selling bras and underwear that are affordable, comfortable, and cute. The brand's foray into loungewear brings all of those qualities to pieces you can be seen wearing out of the house too. This loungewear set, with a tee and joggers, is an easy choice if you're looking for a simple set in a supersoft fabric. If you don't love this style, check out the rest of the All-Day collection — every piece uses the same stretchy, smooth material, but there are a few different styles and color options to fit your preferences. Brooklinen makes some of our favorite sheets, so it's no wonder we love the brand's loungewear too. In line with the rest of what Brooklinen does, the pieces are minimalist (with just a few neutral color offerings) and made with high-quality fabrics that won't warp, shrink, stretch, sag, or pill. Brooklinen's loungewear was inspired by vintage athletic wear, which isn't too overt, but comes through in little details like certain hems and stitching. The straight-cut Bryant Pant has a loose-fitting, easy feel. Pair it with the slim, fitting Highline Tank when you want to feel cozy, but a little more put-together. Brooklinen has plenty of styles that are great for mixing and matching if you want something fitted on the bottom, looser on the top, or vice versa.