# Exos FORM™ II 621 SI Joint Back Brace # Exos FORM™ II 621 SI Joint Back Brace This belt is for SI (sacroiliac) pain and dysfunction and lower back pain and strains. It helps relieve pain resulting from standing or sitting for extended periods of time while supporting the hips. The Exos FORM™ II 621 provides superior stabilization of the sacroiliac (SI) joint through direct compression. Silicone grip strips prevent the brace from migrating. The Exos FORM II 621 compresses the sacroiliac joints while supporting the back, hip, and legs. Wraparound design is simple to adjust for a comfortable fit and controlled pressure. The pulley system is easy to use, enabling you to fit the tension exactly as you need. Designed with a Diamond2 Grid™ construct for a more durable and longer-wearing brace, this belt delivers support with a low profile design. ![Exos Form 2 621](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/exos-form-2-621-back-brace_480x480.gif?v=1625492163) ### Product Features - Pulley Lacing System provides smooth and uniform compression, allowing you to customize the tension. - Diamond Grid System improves durability to prolong use of the brace. - Silicone Grip prevents the support brace from migrating and 'locks' the hips in place - Materials: Nylon, Polyethylene, Polyester, Silicone, Elastic - ComfortCORE™ Foam - Conforms to the unique contours of a patient’s body, adjusts to individual movements. - Diamond2 Grid™ - Adjustable Belt Wings Modifiable belt accommodates varying patient body structures for optimal fit. - Semi-Universal Sizing - For accurate patient sizing. ### Instructions 1. Apply the brace by centering the Rear Panel Section at the midline so that the belt is just above the tailbone. 2. Wrap the belt wings in front, approximately 1" (2.5cm) above the widest part of the hips and secure the hook on the front side of you. 3. Before tightening the brace, make sure the Rear Panel Section is positioned evenly on both sides of you. In order to achieve optimal comfort and fit, it may be necessary to readjust and reposition the two Belt Wings to the Rear Panel Section. 4. To apply compression, grasp the Pull Tab with the thumb and pull away from the body until reaching the desired compression, then secure the Pull Tab to the Belt Wing. ### Size Chart # EXOS FORM II 621   SIZE   WAIST CIRCUMFERENCE   HEIGHT RECOMMENDED   S/M   28 - 50in (71 - 127cm)   ≤ 69in (≤ 175cm)   L/XL   51 - 61in (130 - 155cm)   ≥ 69in (≥ 175cm) ### Documents ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos Form™ II - Brochure](https://www.djoglobal.com/sites/default/files/Exos-Form-II-Brochure.pdf "Exos-Form-II-Brochure.pdf") ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM™ II Family Brochure](https://www.djoglobal.com/sites/default/files/3622%20-%20Exos%20Form%20II%20Brochure_r11-for%20digital_0.pdf "3622 - Exos Form II Brochure_r11-for digital.pdf") ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM™ II Family Brochure - Recovery Sciences](https://www.djoglobal.com/sites/default/files/Exos-Form-II-Family-Product-Brochure-BSTM.pdf "Exos-Form-II-Family-Product-Brochure-BSTM.pdf") ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM™ II Application Instructions - Clinician](https://www.djoglobal.com/sites/default/files/4184%20-%20Exos%20Form%20II_Application%20Instructions_621%20Clinician_r4.pdf "4184 - Exos Form II_Application Instructions_621 Clinician_r4.pdf") ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM™ II Application Instructions - Patient](https://www.djoglobal.com/sites/default/files/4185%20-%20Exos%20Form%20II_Application%20Instructions_621%20Patient_r3.pdf "4185 - Exos Form II_Application Instructions_621 Patient_r3.pdf") ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM™ II 621 Information Sheet](https://www.djoglobal.com/sites/default/files/4274%20-%20Exos%20Form%20II_621_Sell%20Sheet_r7.pdf "4274 - Exos Form II_621_Sell Sheet_r7.pdf") ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM™ II Indications Poster](https://www.djoglobal.com/sites/default/files/4129%20-Exos%20Form%20II_Indications%20Poster%20updates_r7_0.pdf "4129 -Exos Form II_Indications Poster updates_r7.pdf") #### Patient Application Guide ![](https://www.djoglobal.com/sites/all/themes/djoglobal_v025/images/pngs/icons/application-pdf.png "application/pdf")[Exos FORM II 621](https://www.djoglobal.com/sites/default/files/documents/MKT00-4185-RevB-Exos-Form-II-Application-Instructions-621-Patient_r3.pdf "MKT00-4185-RevB-Exos-Form-II-Application-Instructions-621-Patient_r3.pdf") ## Details - **Price:** 82.99 USD - **Vendor:** Exos - **Type:** Back Brace - **Tags:** Back Brace, Brace, Exos FORM II, FSA-HSA-Eligible ## Variants | Variant | Price | Available | |---------|-------|-----------| | S/M | 82.99 USD | In stock | | L/XL | 82.99 USD | In stock | ## Images - Exos FORM™ II 621 SI Joint Back Brace - 300621-40 Exos FORM™ II 621 SI Joint Back Brace - S/M by Supply Physical Therapy Back Brace, Brace, Exos FORM II - Exos FORM™ II 621 SI Joint Back Brace - 300621-40 Exos FORM™ II 621 SI Joint Back Brace - S/M by Supply Physical Therapy Back Brace, Brace, Exos FORM II - Exos FORM™ II 621 SI Joint Back Brace - 300621-40 Exos FORM™ II 621 SI Joint Back Brace - S/M by Supply Physical Therapy Back Brace, Brace, Exos FORM II - Exos FORM™ II 621 SI Joint Back Brace - 300621-40 Exos FORM™ II 621 SI Joint Back Brace - S/M by Supply Physical Therapy Back Brace, Brace, Exos FORM II --- > Source: [Supply Physical Therapy](https://supplypt.com/products/exos-for-ii-621-si-joint-back-brace) > Updated: 2026-09-18