Welcome back to a new redesigned Glycerin where midsole and outsole offer a widened platform for smoother, easier transitions. Predecessor: Glycerin 19. Support type: Neutral. Cushioning: Maximum cushioning. Surface: Road. Midsole drop: 10mm. Arch: Medium/High. Innovative nitrogen infusion process allows fine-tuning the softness with careful precision so we never sacrifice weight, durability, or responsiveness. Plush and breathable engineered air mesh upper offers a secure fit, comfortably holding the foot in place. cushioning technologies all start with DNA because they react to your unique stride.