This Crew with d3o patch at elbow and thumbholes. d3o contains intelligent molecules that flow with you as you move but lock together on impact, absorbing the impact''s energy. Under normal conditions d3o is soft and pliable but on impact the material reacts instantly, providing a shock absorbing platform. d3o is flexible and lightweight and rivals all conventional protective materials making it a great addition to the Sessions layering program. Sessions has placed the d3o technology in the men''s and women''s first layer top and bottom pieces. d3o is placed on direct contact areas to provide shock protection.