Purple 5" Twin Flat Foundation delivers steady, low-profile support designed to give your mattress a flat, reliable base and promote even weight distribution. The dense polyurethane core creates a resilient surface that minimizes sag and supports sleep performance, while the twin size and slim profile fit standard bed frames and pair easily with a box spring when needed. Lightweight panels and a simple installation make this foundation practical for bedrooms, guest rooms, and spaces that need dependable mattress support.