Couch Cushion Support Board

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XXL ADJUSTABLE COVERAGE: Measuring 21.5" x 72", this extra-large support board is perfectly sized for 3-seater and 4-seater sofas. The innovative foldable design allows it to adjus t from 60" to 72", ensuring a snug fit for various couch widths. SUPERIOR PLYWOOD STRENGTH: Unlike flimsy plastic or cardboard alternatives, our support features a 0.4" thick heavy-duty plywood inner core. This provides 3x the reinforcement of standard supports to instantly fix sagging and restore firm, upright seating. EXCLUSIVE ANTI-SLIP HEXAGRAM GRIP: Say goodbye to shifting cushions! One side is equipped with a specialized anti-slip hexagram pattern that creates a high-friction surface, keeping your cushions securely in place even with heavy daily use. DURABLE & WATERPROOF FABRIC: Wrapped in premium, tear-resistant Oxford fabric, this board is built for longevity. The material is waterproof and breathable, protecting your furniture while providing a comfortable, stable base. SAY GOODBYE TO BACK PAIN: By providing a level, firm surface, this board helps correct poor seating posture caused by sagging springs. It’s an ergonomic and cost-effective way to improve comfort and extend the life of your favorite furniture without expensive repairs. Show more