A couple things I've added this year that I'm pretty impressed with, and thought others might like to know about as well:

Chantelle Soft Stretch undies. I ordered three different styles, the Bikini, the Hipster, and the Full Brief. I read a random review of these designed-in-France undies last year and the praise was glowing enough that I decided I wanted to try them. They are indeed pretty close to invisible even under leggings, jersey dresses, etc. The material is super smooth, thin, and very stretchy. Almost like a high quality opaque stocking but not at all compressive. The most intriguing thing about these is that they are "one size fits all" meaning XS-XL. I take a Small in most underwear styles and have no complaints about the fit. They really do stretch a lot, but I'd be curious to hear from people at the ends of the size range who've tried them. Also, they do offer a "full" line that is supposed to fit size 1X-4X, and can be worn by straight-sized women who prefer fuller coverage. I am intrigued! If I buy more, I'll stick with the hipster cut. The bikini is a bit too low-rise for me, the full brief a bit too high-rise and the leg openings have a tendency to roll up a bit. The hipster is right in the middle of the two, and the leg openings are just right, not too low, not too high. They make bras too, but even the wireless/bralette styles look a bit overbuilt for my preferences, so there will be no matching sets in my future.

Girlfriend Lite Leggings. I love these. I was looking for a lightweight, very fast-drying legging for spring/summer/early fall, and for studio use. These are lightweight but opaque and super flexible. If you like a structured, compressive legging, it's not this one. The material ("Econyl" recycled nylon from fishing nets) is very smooth, and has maybe a little more sheen to it than is cool these days, but whatever. The 23" inseam is perfect for a below the calf/above the ankle fit. The seams are nicely placed, but I also put myself on the waitlist for the seamless version, to use under dresses in cold weather. I also really appreciate that these have ZERO visible branding, unlike Lulu, Athleta, and everyone else. The company donates money to environmental orgs, emphasizes recycled materials (Econyl, RPET, Cupro), and employs diverse models. I'm definitely going to try the original compression fabric, possibly one of their sports bras, and might even succumb to the bike short trend and give those a spin this summer.