Size is XL - 4 mm thickness. two layers of 4mm! With both layers it is good down in to the 30's ! Brand is ActionPlus - kevlar reinforced wetsuit (kevlar knee pads to avoid rock abraisons). Condition is "Pre-owned". used only about 6 times. It has a small slit in the front that came by a "near miss" Other wise the suit is in very good condition. I am too large for the suit at 200 lbs and 5'8... IT is an XL suit and would fit a 150 - 180 pound person max