Winston Porter Features 85% Polyester 15% spandex fabric makes it covers more stretchy and durable, ensuring both good function and comfort. Having such a sofa cover not only protects your sofa from spills and stains but also gives your sofa a new rejuvenated look if your sofa looks a bit broken or not so new. It cover can cover the back of your sofa, providing all-round protection. Feature anti-slip foam strips, which can be tucked into the grooves where you needed to make the fabric tighter. The elasticized bottom will secure the slipcover stay in place firmly. For detailed installation steps, please check the attached video.