The CK4252S CK4252S-091 does what it is supposed to do. Manufacturerd by a quality brand in Calvin Klein Platinum, means the CK4252S CK4252S-091 has been manufactured to last. Like all Calvin Klein Platinum sunglasses you will receive a manufacturer's warranty, and will be able to send back your Calvin Klein Platinum sunglasses in the event you are not entirely happy with your order.