Keeps you warm on open water swims when the water temperature is between the summer- just a bathing suit and early fall- shorty wetsuit.   Lots of flexibility for shoulder movement.  Size is right (I'm a large) for swimming but tight to take off when wet.

This is my first rashguard and I bought it as much for the neoprene core / warmth as for the rashguard capabilities.  Used it on vacation on cape cod and it performed well - gave me just that little extra bit of warmth to be able to boogie board with the kids all afternoon in the hurricane bill surf.  it does fit tight (I'm 5'10, 185 and got a large) but I think it's supposed to.  don't forget that the care instructions will be a little different b/c of the neoprene (as opposed to an all lycra guard).

Its great, however, I do wish it was a little bigger, otherwise its great.