Our pure memory foam backrest pillow provides a blend of comfort and support. Made with only the highest quality materials, tested by OEKO-TEX and earning their STANDARD 100 label, our back cushion is certified safe. Your cushion will never become flat or sag. It provides upper, middle, and lower back support to reduce pressure and pain while sitting for extended periods. The dual adjustable straps ensure a customized support for any and all heights. Straps tighten down to a minimum length of 16.5 inches and extend to a maximum length of 20 inches with the extender strap. Please note that the circumference needs to measure a minimum of 32 inches to ensure proper fit.