Finally found the perfect lighweight baselayer that fits exactly like I've been looking for. Fits close but not tight to the torso, loose along the length of the arms for comfort and easy to pull up the sleeves. And the fabric is so lighweight it feels like it isn't even there, plus it's ultra soft and cool to the touch. I've had a Nike ACG baselayer since 1999 that I've used for everything: snowboarding, mountain biking, hiking etc and can finally retire it from duty now that I've found the perfect replacement with a similar fit but even lighter overall weight. I have long arms and the sleeve length is more than enough and the combination of thumb holes and loose/uncuffed ends are exactly what I wanted.