I own the Radiant LT Zip layer in multiple colors and I have bought as a gift for multiple friends, both male and female. It's a fantastic addition to layering. Low profile collar fits under jackets without neck bunch. Fit is trim, allowing for a great fit under a jacket or down layer. The fabric show minimal piling after, literally, years of washing. I have one that is 4 years old at it looks every bit as good as the new one I purchased this year.
"Best warm layer i've ever owned- never leave home without it"
I've been wearing these for years- in fact, I get one or two each season so I've got a hefty collection. I'm always cold and for my sport (rock climbing) we are always chasing cooler temps. I love this top for climbing, it's warm, durable, flexible (moves with me) and it's got a little neck that I can zip up to keep me really warm or unzip if I'm feeling a little hot. It washes well, wears well and is all around super functional. I literally wear these tops every day that I go out climbing!
This shirt is so comfortable as a base or second layer and it has held up through a lot. It's been on several camping and backpacking trips and survived a month of field work. The zipper works flawlessly and the thumb holes are awesome. I got mine in black and it looks great. The only downside I can see is that it's starting to pill a bit around the elbows, but I have used/washed it a ton, and despite this it still looks great unless you are looking for the pilling, which chance are only I am. Cannot wait to save up some cash and get another one of these in a new color :)