I wanted to like this--especially as I've had such great luck with Icebreaker, with other styles--but the Siren tank, sadly, isn't a great fit on me. The straps (non-adjustable) were too long, making for an awkward fit on my very-slender, 5'4" body. (For others taller/larger, it should work much better.) My search for a nice tank underlay continues...