If you purchased your S4 sunglasses or goggles from S4optics.com they are already registered and you do not need to register for the warranty.
If you purchased from a retail store or another online store please complete and submit this warranty registration form. If your Warranty Registration is approved you will be issued a warranty registration number which you will use when submitting a warranty claim.
When you submit a warranty claim there is a $20 processing fee. You must include a copy of your receipt (from S4optics.com or an S4 authorized dealer) in the package with your warranty item.