Utilizing the incredible new StructUre and d3o technologies, Ribcap is designed for athletes that prefer not to wear a helmet, but would still like to protect themselves.  d3o and StructUre are revolutionary new materials that are soft and flexible during normal use, but upon impact their molecules lock together, stiffening the material and absorbing shock!  The material then softens again immediately following impact!  By combining a wool cap with these materials, Ribcap makes you look good while providing you with excellent protection!  The latest line introduced StructUre, a visco-elastic material that offers the same protection as d3o, but is MUCH lighter (only 1/10th the weight!) and much more breathable!