Dogs need UV protection just as humans do. If your dog is out and about with you and you have your sunglasses on, your dog should be wearing Doggles to protect its eyes from harmful UV rays as well. Your dog can't tell you his eyes hurt. Be proactive and help your dog's eyes to be safe. Recommended by Vet Ophthalmologists to protect their patients in all types of situations and also after some types of eye surgery. 100% UV protection. Shatterproof and antifog lens. Flexible rubber frame with removable lenses. Interchangeable lens available. Double straps hold glasses in place. Available in size XS, S, M, L, XL. SEE SIZE CHART FOR CORRECT SIZE. MOST SMALL BREEDS WILL WEAR SIZE XS.