UNIVERSAL POSTAGE AND SPINE CORRECTOR A spider on the back is an excellent device for correcting posture and spine defects and preventing their development. In addition, it reduces the risk of ailments such as back pain and muscle numbness, which are associated with incorrect posture . The posture corrector has been equipped with a breathable nylon belt with an adjustable length that does not restrict movement. It helps to maintain proper body posture. In particular, it will improve the position of your spine in the dorsal and lumbar spine. Lots of advantages that will improve the quality of your life! Stabilizes posture - prevents back slouching and an unnaturally crouched position, Supports the formation of correct habits - fights back pain and muscle numbness, Provides comfort of use - the nylon belt is adjustable in length and does not restrict movement, SIZE Size S. Chest circumference: 46-68cm For weight: 20-40KG Size M Chest circumference: 68-91cm For weight: 40-70KG Size L. Chest circumference: 91-119cm For weight: 70-100KG Size XL Chest circumference: 119-140 cm For weight: 90-120KG Size 2XL Chest circumference: 140-155cm For weight: 20-135KG Size 3XL Chest circumference: 155-170cm For weight: 135-150KG USER MANUAL Pass the straps through the clamps, Fasten loosely to be able to easily put on the posture corrector Unfasten the straps, tighten them so that they perfectly fit your body, when you feel that the silhouette is straight enough fasten the seat belts, Make a final tension assessment, if your corrector straightens your back, close the Velcro fasteners and enjoy using it. PRODUCT ADVANTAGES Support for the sacro-lumbar region Corrects posture and restores a healthier body posture Provides shaping and improvement of the figure It reduces pain in the upper back It has a size adjustment It helps prevent scoliosis and other spine problems It can be used for everyday use, e.g. at work or while riding a bicycle The thin and light material is breathable and absorbs sweat WE ARE SURE OF THE QUALITY! If our product did not meet your expectations , we suggest 3 simple steps: Send the product back WE WILL REFUND 100% We will maintain a great relationship!