What is the intended waist size range for Size 4, and why is correct sizing critical for this brace?

Size 4 of the Fosta model 216 is specifically intended for individuals with larger waist measurements. Getting the correct size is not just about comfort; it is fundamental to the brace's functionality. A brace can only work properly when the fit is correct. If the size is too loose, the lateral stiffeners will not effectively distribute the load around the lumbar-sacral area, and the shoulder straps will not provide the necessary tension to cue posture correction.

Conversely, if it is too tight, it may restrict natural movement or cause discomfort. The goal is to achieve a fit that adds structure without fully blocking natural movement, allowing you to bend and work effectively. Because this product is an aid for heavy manual tasks, ensuring you select the size that matches your waist measurement is crucial for receiving the intended stability and support during lifting and carrying.