Thermoskin Elastic Back Stabiliser Support - Large Provides compression and support for general lower back dysfunctions. Elastic Back has 4 internal stays for additional support, adjustable elastic side straps for extra compression, and lightweight breathable material for wearer comfort. Application Position the lower part of the back piece on the coccyx bone and then wrap the piece and secure with the velcro hook and loop. Make sure the middle two internal stays are on either side of the spine. Secure the elastic side straps for extra compression.