A duel of the dual chambers is taking place right under your seat! The NYOrtho Gel-Foam Cushion has dual density foam layers promoting envelopment on the one hand, and pressure distribution on the other. It also has a dual-chambered gel pod that reduces gel migration and keep things cool. Antimicrobial, water-resistant and mildew-resistant fabric adds to the pressure relief. Cushion is tightly secured by non-slip bottom and quick-release straps.