NP Surf Fire Line Insulation Neoprene Wetsuit Hoodie with Reinforced Harness Hook - Premium Cold Water Surfing & Diving Gear for Extreme Conditions

2mm.. stretchable enough, a bit baggy style, but that's for functionality , I wear L to XL harnesses and XL-XXL "NP High Hook Lite Vest" and this Large neoprene hoodie fits just enough to accommodate that. i like the color grey/green.I've owned "2012 NPX 2mm Neoprene Wind Front Zip Jacket" and that thing was way more stiff and thick ..even though it has 2mm in it's name, this "NP Surf Fire Line" is way more flexible and thin.