The Musto Neoprene strip is installed quickly, can be adjusted very easily and keeps the glasses in all activities where it should be. Even when swimming This works beautifully. The glasses wears while still propagated very pleasant and the material has led me not to skin irritations nor to other problems. The neoprene band is meticulously crafted and not zerfastert. Whether a little neoprene with 2 seams really is worth 6.90 can be questioned, but no later than when wearing the belt and the glasses no longer slips disturbing the investment has paid off.