Additional lateral foam inserts keep the pad low-profile and allow for unrestricted movement, without bumping the cost sky high.
The RHEON™ insert is located on an airprene backing to provide structure, and also moderate temperatures on those all day epics.
The calf gusset is designed to keep the pad in place, combined with the generous silicone band around the top, and the upper stretch mesh which allows movement of your leg while keeping everything where it needs to be.