# DonJoy® OA Reaction Web Knee Brace # DonJoy® OA Reaction Web Knee Brace ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/fsa-hsa-approved-logo-p2_1_orig_480x480_d51ebcd0-4d33-4e1e-803b-2d17295e8e9a_100x100.png?v=1637350791) The DonJoy® OA Reaction Web is the lowest profile knee brace on the market to treat early or mild OA (osteoarthritis). The patented silicone web technology provides a custom fit that won't slip; it's so comfortable, users may forget they're wearing a brace. A new level of bracing comfort for those with early to mild OA of the knee, or early joint space narrowing. The DonJoy® OA Reaction Web offers discreet wearability utilizing mild offloading and proprioception to help reduce knee pain for mild to moderate activity.  ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/donjoy-oa-reaction-diagram_1_480x480.png?v=1630503631) **Designed to Help Manage Pain Associated With:** - Arthritis **Best For:** - Everyday Activities - Golf - Running - Tennis - Walking **A Discreet Support for Osteoarthritis Knee Pain** The DonJoy® OA Reaction Web is the lowest profile knee brace on the market to treat early or mild OA. The patented silicone web technology provides a custom fit that won't slip; it's so comfortable, users may forget they're wearing a brace. A new level of bracing comfort for those with early to mild OA of the knee, or early joint space narrowing. OA Reaction Web offers discreet wearability utilizing mild offloading and proprioception to help reduce knee pain for mild to moderate activity. DonJoy® is taking OA bracing to the next level of comfort using silicone web technology. OA Reaction Web offers the thinnest and most open framework available. OA Reaction Web gives those with OA knee pain the relief they need in a comfortable, lightweight, low-profile brace that can even be worn under clothing before, during and after activity. Designed for those who participate in mild activity, obese patients, and active aging patients who jog, hike or play tennis or golf. ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/Knee_Osteoarthritis_480x480_983a23d5-6a00-42b2-bc1b-264bb508930b_480x480.jpg?v=1630503662) ### Benefits (1)   Lightweight, Low-Profile Pain Relief Made out of lightweight silicone this brace is low-profile so you can wear it under pants, skirts, or with exercise clothing. (2)   Shockabsorbing The Silicone Web Technology scientifically designed to help provide shock absorption and anterior knee pain relief a symptom of OA of both the knee joint and the patella. (3)   Four-Way, Adjustable Wraparound Design Comfortable, form-fitting design creates a custom- like fit for most legs that is easy to apply (4)  Patented, Integrated Silicone Comfortable offloading of the knee with a nonslip cup effect; the hexagon design allows air pockets to gently support the knee (5)  Easy to Wear The most open and lightweight design available in OA knee bracing ### Sizing [Donjoy Sizing Guide](https://www.youtube.com/embed/Q1m0gOFVcUc) Take the measurement of your thigh and calf 6" above and below your kneecap using a flexible type tape measure.  Use the diameter you measure here to choose your size. **Note: Knee measurement is the most important, if you measure between sizes we recommend going up one size for optimum comfort and fit** **Size** **Thigh** **Knee Center** **Calf** XS 13" - 15 1/2" 12"-13" 10"-12" S 15 1/2" - 18 1/2" 13"-14" 12"-14" M 18 1/2"- 21" 14"-15" 14"-16" L 21"- 23 1/2" 15"-17" 16"-18" XL 23 1/2" - 26 1/2" 17"-19" 18"-20" XXL 26 1/2" - 29 1/2" 19"-21" 20"-22" XXXL 29 1/2" - 32" 21"-23" 22"-24" ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/knee-sizing-center_480x480.jpg?v=1630503660) 1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted. ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/knee-sizing-six-inch-above_480x480.jpg?v=1630503657) 2\. Measure up six inches from the center of your knee with a tape measure, as shown. ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/knee-sizing-calf-circumference_480x480.jpg?v=1630503654) 3\. Measure the circumference of your thigh at the 6-inch mark, as shown. ![](https://cdn.shopify.com/s/files/1/0533/4587/8181/files/knee-sizing-6-inch-below_480x480.jpg?v=1630503649) 4\. Measure down six inches from the center of your knee with a tape measure, as shown. Then measure the circumference of your calf at the 6-inch mark. ### Videos [Donjoy Sizing Video](https://www.youtube.com/embed/yQl1r_a8h0g) ## Details - **Price:** 147.99 USD - **Vendor:** DonJoy Performance - **Type:** Brace - **Tags:** Brace, DonJoy, Donjoy Performance, FSA-HSA-Eligible, Knee, Knee brace, Sports Bracing ## Variants | Variant | Price | Available | |---------|-------|-----------| | XS / Medial Right or Lateral Left | 147.99 USD | In stock | | XS / Medial Left or Lateral Right | 147.99 USD | In stock | | S / Medial Right or Lateral Left | 147.99 USD | In stock | | S / Medial Left or Lateral Right | 147.99 USD | In stock | | M / Medial Right or Lateral Left | 147.99 USD | In stock | | M / Medial Left or Lateral Right | 147.99 USD | In stock | | L / Medial Right or Lateral Left | 147.99 USD | In stock | | L / Medial Left or Lateral Right | 147.99 USD | In stock | | XL / Medial Right or Lateral Left | 147.99 USD | In stock | | XL / Medial Left or Lateral Right | 147.99 USD | In stock | | XXL / Medial Right or Lateral Left | 147.99 USD | In stock | | XXL / Medial Left or Lateral Right | 147.99 USD | In stock | | XXXL / Medial Right or Lateral Left | 147.99 USD | In stock | | XXXL / Medial Left or Lateral Right | 147.99 USD | In stock | ## Images - DonJoy® OA Reaction Web Knee Brace - 11-7426-1 DonJoy® OA Reaction Web Knee Brace - XS / Medial Right or Lateral Left by Supply Physical Therapy Brace, DonJoy, Donjoy Performance, Knee, Knee brace, Sports Bracing - DonJoy® OA Reaction Web Knee Brace - 11-7426-1 DonJoy® OA Reaction Web Knee Brace - XS / Medial Right or Lateral Left by Supply Physical Therapy Brace, DonJoy, Donjoy Performance, Knee, Knee brace, Sports Bracing - DonJoy® OA Reaction Web Knee Brace - 11-7426-1 DonJoy® OA Reaction Web Knee Brace - XS / Medial Right or Lateral Left by Supply Physical Therapy Brace, DonJoy, Donjoy Performance, Knee, Knee brace, Sports Bracing - DonJoy® OA Reaction Web Knee Brace - 11-7426-1 DonJoy® OA Reaction Web Knee Brace - XS / Medial Right or Lateral Left by Supply Physical Therapy Brace, DonJoy, Donjoy Performance, Knee, Knee brace, Sports Bracing - DonJoy® OA Reaction Web Knee Brace - 11-7426-1 DonJoy® OA Reaction Web Knee Brace - XS / Medial Right or Lateral Left by Supply Physical Therapy Brace, DonJoy, Donjoy Performance, Knee, Knee brace, Sports Bracing --- > Source: [Supply Physical Therapy](https://supplypt.com/products/donjoy-oa-reaction-web-knee-brace) > Updated: 2026-09-14