Rearfoot & Forefoot Hydroflow - dynamic viscous fluid for industry leading shock dampening and comfort Full-length BioMoGo - more environmentally friendly MoGo E1 Rearfoot Polymer & E2 Forefoot Polymer - resilience, dampening, and propulsion when and where you need it most Progressive Diagonal Rollbar - smoother transition from midstance to propulsion phase HPR Plus - durability & abrasion resistance for longer wear Element mesh & lining - light and supple moisture-management