Order the same size as your outerwear camo. ASAT is made bigger to accomodate going over your normal clothing.

Thanks Aussie! Hey, FYI there is no dot after the com in the link you put on your post. You may want to edit your post so others may use it to get to the web-site.
Thanks Again

BigNastyD

Your self description does not match your screen name

But you should be able to get away with a medium.

I am 5" 8 about 170lbs and I have a large that is a little too big on me but I like loose fitting clothes.

All the 3d suits are cut slightly larger to accomodate layering.