This Neo G RX Sacroiliac Belt is constructed from breathable fabric and is designed to help with lower back instability and to help support weak lower back muscles. It can help with referred pain in the buttocks, leg, ankle and foot areas by helping to relieve pressure on the pelvic and the sacroiliac joint area. It helps support/align the pelvic area by aiding stabilization of the sacroiliac joint. The slimline, snug and dynamic design means it can easily be worn under everyday clothes at work, home or on the field for comfort, support and reassurance when you need it most. Embedded Silver* - for microbial and odour control & Embedded Aloe Vera - helps moisturise, soften and soothe the skin. *Silver - helps reduce microbial growth in the fabric support and thereby control odour. The silver is intended to protect the support and does not extend protection to the skin. SIZING GUIDE - To size, measure pelvic circumference (cm) - Small: up to 86 cm; Medium: 86 - 99 cm; Large: 99 - 119 cm; X-Large: 119 - 132 cm.