1. Reduced FSW width. O’Neill decreased the width of the Fluid Seam Weld (FSW) by 60% percent on the new Psycho 3. This 60% reduction in width has resulted in more stretch in the seams, which is where the stretch is most restricted in all wetsuits.
2. TechnoButter Neoprene. It’s lighter and has more stretch. 17% lighter and absorbs 30% less water. How much lighter is it really? Get his, I weighed the men’s size large in a 3/2 and it weighed 2.55lbs – unreal.
Combine those two benefits, with the new XDS-Air and you’ve got a wetsuit that’s lighter, more flexible and warmer than any Psycho 2 ever made.
Bottom Line: The new Psycho 3 is going to be just about as flexible as the Pscyho 1 wetsuit and that’s a unreal.
Best use: Cold water and chilly to cold air temp for the 3/2 and just plain cold for the 4/3.