Perfectly sized for square cushion covers, the White Inner Cushion 40x40 brings gentle support and everyday comfort to your favorite spots at home.. The soft cotton cover wraps a plush polyester fiber filling that holds its shape without feeling stiff, making it ideal for layering on sofas, beds, or lounge chairs.. Its clean white surface stays discreet beneath any fabric or color. You can easily pair this insert with any 40x40 cm cushion cover from our collection to complete your setup with comfort and ease.