I've been using the Paradox base layers in several weights for some time and am very impressed with them. First, I find that the layers do not become smelly even after multiple days of hard wear. Many base layers I've tried have become pretty smelly after a couple hours. On a twp month AT hike I did not have regular long pants or a standard shirt, but used shorts combined with paradox base layers to keep me warm. Even wearing the paradox layers outside the shorts, I did not have any significant wear issues. During this quite wet hike, the paradox layers were worn almost every day, and unless the temps were near freezing, I did not use a rain jacket, but just a light wind shirt. I found the base layers wicked moisture very well, and I did not feel at all clammy. I would rate the heavier paradox bases as at least as warm as capilene 3 bases. Note that Costco has sold a number of base layer items in the last few years. I just checked some labels, and see that some of them are 100% polyester, some are 11% merino, and some are 54% merino with the remainder polyester and spandex. I find that the thin base layers pill some after quite a bit of wear. (This is something that does not bother me, but I know it bothers some folks.) The thicker base layers have yet to pill even after very heavy use. The sewing on these cloths is excellent, and I have yet to have any problems with seams opening. I guess you can tell that I'd recommend these bases.