Inverted Seams for patient comfort and caretaker convenience when disinfecting Light weight to reduce shipping costs Maintains cool, dry, and soft feel to maximize patient comfort.This versatile home care sleep surface is light weight and affordable while always maintaining quality and health standards.Fiber-Core technology mattress properties and benefits include: Removable Zippered Cover Soft and durable polyester fiber core construction Durable Weight capacity: 300 lbs.Economy Fiber-Core Camp Mattress - 36" x 80" x 6" (Twin-XL), Nylon The smooth, soft, and breathable cover is offered in nylon to maximize comfort and therapeutic sleep.