I recently (within past month) went deep down the rabbit hole of sustainable and natural fibers. I was shocked to learn about synthetics and their impact on our bodies and our planet. I purchased 4 pair of the boxer briefs and after a month of use, I have found my favorite undies of all time. I also bought some alpaca/lyocel undies to compare and I love these so much more. They are insanely comfortable, stay in place all day long, are durable enough for working out. And best of all, they don’t stink at all. I’m a weirdo and did a test to wear them for 4 days of normal use to see if they would smell, they never did. I don’t plan to do this but it’s nice to know, they are perfect for minimalist travel situations. A couple of notes, they do run a little small. I ordered an extra large based on other reviews and they were perfect. So when in doubt, size up. I also ordered their tshirt and I will be testing that as well. So far the fit is great but I want to see if it will have the same odor resistant and breathability as the boxer briefs. I like the thicker feel of it and would easily replace my merino wool shirts for travel if the performance is the same. Incredible products, better for our bodies and planet, I’m a customer for life