The S10, Arm-adillo II shoulder stabilizer is a re-design of the original S5 Arm-adillo. Upgrades include a durable foam material with bound edges, stronger and more versatile abduction control "X" strap and better sizing in the torso, chest and biceps. Gone is the Velplush but as one distributor stated; "I'll take better durability over breathability after testing it."
www.youtube.com/watch S10 Fitting Instructions
www.youtube.com/watch Difference between the S5 and S10