The 2010 model of the 8404 chest and arm has undergone major changes like the senior 8606 model. The arm construction is new with a quilted nylon base for stability. New larger shoulder floaters provide increased protection and mimic the look of the pro models. The large size range fits both small and large kids from 4' tall to 5' tall, making this appropriate for several age groups. Protection is geared on the safe side for older ages. The unit features the split bottom belly on the chest protector, full sternum protection, large size arm floaters, and flexible arm design for comfort and easy break-in