I have 3 pairs of PI, and they work great - the warmth isnt a issue unless it gets in the 90s, but by then I am ready to fall over anyway. They were cheap, but I am not happy with how long they are (way too long). I wear a 36 sleeve on my shirts and these have 2+ inches extra length that I have to roll over at the top. Large was too small, XL is too long. It would be nice if we could get colors other than black and white