Where should the control attachment strap (CAS) be located for optimal comfort?

The optimal location for the control attachment strap (CAS) for comfort is at the distal one-third of the scapula. This positioning is important because it effectively utilizes the anatomical structure of the scapula to distribute the forces exerted by the strap evenly across the shoulder and upper back, which helps minimize discomfort. By placing the strap in this area, it avoids excessive pressure on other sensitive regions, allowing for better mobility and increased comfort during use.

When the strap is positioned too high at the proximal end or at the midpoint of the scapula, it may create tension that could lead to discomfort and restricted movement. Similarly, positioning the strap at the inferior edge of the scapula could lead to pinching or irritation of the skin and underlying tissues. Thus, the distal one-third of the scapula is the most advantageous location to ensure that the wearer can maintain comfort while benefiting from the support and control that the strap provides.