FIT MEASUREMENTS - The PlayActive SI Belt size REGULAR fits hip circumference 32 - 47 inches and size XL/XXL fits hip circumference 47 - 56 inches. Unisex design for men and women. Measure right above your hips, see our images for a visual illustration. The belt can be worn under or over your clothing. Stabilizing compression hip brace..RELIEVES SCIATICA AND LOWER BACK PAIN - The adjustable hip compression SI brace will help support your lower spine and hips to relieve pain, pressure and stress caused by pelvic instability or SI joint dysfunction. The PlayActive medical grade belt is designed to effectively stabilize and support your pelvis and hips. Simply the best solution for: back pain, hip pain, pelvic pain, upper leg pain, symphysis pubis dysfunction, pelvic girdle pain, piriformis syndrome or anterior pelvic tilt..ANTI-SLIP AND DURABLE - The PlayActive SI Joint brace will stay in place, no matter what. The unique anti-slip material will make sure that your belt won’t move around or ride up your hips. We also made sure to keep the material lightweight and very durable. You will have no problem wearing this belt for longer periods of time. Comfortably wear it around the house, during sports, other activities or even at night..EASY TO USE AND ADJUST - The smart design of this belt allows you to adjust the tightness and compression to your preference. Simply adjust the two elastic tension straps and get a tighter or looser fit. The strong hook & loop closures are equipped with ‘smart tabs’ that make it super easy to unstick the straps. The PlayActive belt is very easy to use, comes with clear instructions and is backed by our world class customer service!.100% SATISFACTION - If, for any reason, you are not completely happy with your PlayActive Sacroiliac Hip Belt, simply let us know and we will refund every penny. No questions asked! Our customer service will always be there to answer any questions you might have.