O’Neill Womens O’Riginal 4/3mm Back Zip Wetsuit The fully sealed O’Riginal Fullsuit ticks all the right boxes. Classic style paired with modern technology and the best fit in the industry. 360° Barrier with Drainholes Strategic Seamless Paddle Zones Single Seal Neck Smoothskin Carbon-Firewall: The interior thermal lining absorbs body heat in core areas and retains it due to the SmoothSkin exterior shedding water and reducing wind chill. Ultraflex: Ultra Stretch, Super soft and premium neoprene for superior feel, flexibilty and high performance. Ultraflex Taped Seams: Soft and durable neoprene seam tape. 0.5mm split-neoprene applied to triple-glued seams to seal out water keeping you dry and loose.