1.Comfortable Adjustable & Breathable Stretchy Fabrics - This Waist Trimmer Belt made of Stretchy neoprene finest fabric, Covered with ventilation holes, which means it is easy to Sweat and breathable, fits to your body, and will not pitch or irritate your skin. Double velcro adjustment for sizing accuracy, Mesh backing for breathability during hot sauna or other fitness activities.^ 2.Double-adjustment Durable Velcro - Closure waistband to enhance the compression around your tummy and adjustment. You don't worry about velcro falling off when you're exercising, because the velcro and the material inside are stitch together. Our trimmer is naturally flexible to adjust to your size and shape and contoured to fit around your waist comfortably during exercise. A spandex belt provides more cinching ability for this waist trainer.^ 3.Back Support & Tummy Tuck - 4 reinforced acrylic bones provides tons of support on your sides and back. If you have lower back issues, our waist trimmer belt like a compression binder around the waist to offer lumbar support, help relieve pain and improve posture, keep your muscles warm, Stabilize Spine. Provides Support that helps Prevent a Herniated Disc, Lumber Muscle Strain, Back Pain.^ 4.Function Workout Waist Trainer - Waist shaper belt help smooth your after pregnancy or c-section tummy flabby and love handles,helping you look slimmer.It also helps postpartum recovery all process,reduce swelling,tighten skin,control tummy,support back,relief waist pain,ease transition of uterus and shrink it down to normal size,make your body get back to its original shape,and can be used during work, daily outfit, workout, fitness or yoga.^ 5.BURN MORE CALORIES- Sweat waist trainers belt is designed to boost your core temperature during exercise, it will help you burn belly fat a lot faster if you combine it with intensive workout by improving sweat production. Use it to support your lower back and lumbar on the treadmill to prevent injury too.