A sunlounger (British "sun lounger") is a chair-like device, typically placed in a patio, garden, or swimming pool deck, or used as beach-side outdoor furniture.^[1]

They are often constructed from wood, formed plastic, or metal and indoor fabrics. They have designed adjustable backs for people to lie down, or sit up on, (recline) while relaxing.^[2] Somewhat like a deckchair and bed-like in nature, the rear surface can be up to allow the user to sit up and read, or it can be reclined to a flat surface to allow sleeping in the horizontal position (supine and prone position).^[3]