The STX Cell IV Lacrosse Shoulder Pads are 25% lighter than the best selling Cell 3 shoulder pads because it contains GeoFlex Technology.This technology provides players with optimal flexibility and support. STX Cell IV padding series is renowned for a "soft" and supple feel that gives players lots of protection and comfort. More and more players on the offensive side of the field are opting for a bit more protection, carbon shafts and stiffer defensive heads are making attackman and middies think twice before shedding all that padding.The STX Cell 4 shoulder pads also have new and improved "stretch zones." These places where the pads come together have a flexible mesh membrane that lets the pads float around and adjust to your body as you move. Nice, big quality rib straps with velcro adjustments on the cell pads.