A long time fave of our staff, Capilene 2 may be the most versatile piece of clothing that you can own as an outdoors-person.
It has the fastest dry time of all performance baselayer fabrics, with an open-knit construction that breathes and wicks to keep you dry and warm on cold days. The flat-ribbed underarm panels eliminate chafe for paddlers and backpackers.
If you can only have one set of base layer underwear – Make it the Patagonia Capilene 2!