ComfortCore® Plus with Memory Foam advanced layering system provides varying support for optimal comfort, stability and durability,Memory foam layer conforms to deliver individualized support,Poly-fiber top layer adds to overall plushness and give,Softer support layer at front of seat cushion for flexible comfort,Firmer support layer at back of seat cushion for stronger support,Mid-layer seat cushioning adds stability and durability,Top layer seat cushioning helps alleviate discomfort,Plush pillowed body layers provide cushioning and pressure point relief,Ergonomic seat-side controls allow for quick and easy height and tilt adjustment,Contoured lumbar zone provides customized lower back support,Supports up to 250 pounds,Some assembly required