One of the most popular back brace, the Flexibrace® Back Support provides a maximum level of support (level 3). It features a thermal 100% Latex-free Neoprene (CR) back panel with 4 resilient stays, cool, breathable side panels, and firm elastic side pulls that provide adjustable compression and support. Thermal neoprene back section provides therapeutic heat retention to help relieve pain and promote healing. *Helps relieve lower back pain by reducing strain. *Fully adjustable vented and breathable elastic side panels. *Adjustable support with neoprene back panel for warmth and compression. *Six stays for extra support. *Easy application. *Our most popular back support. Sizes (measure around waist): Small fits 24"-32" Waist. (60cm to 81cm) Medium / Regular fits 27" to 42" Waist.(68cm to 106cm) Large fits 36" to 52" Waist. (91cm to 132cm) XLarge fits 46"-60" Waist. (116cm to 152cm)