MRP Ribbon SL ForkRibbon SL Outcast arch design with forward facing weight reliefs to mitigate mud build up and deliver a distinctive look. PSST pressure relief valves that quickly and easily bleed off excess pressure in the lowers caused by elevation and temperature changes. New bladder free damper utilizing a low pressure IFP. Independently adjustable positive and negative air chambers for greater tunability. Adjustable internal volume with Huck Puck system. "Boost"