1.UV protection and prevention are key to your pet's healthy eyes.Shatterproof Lens. Anti-fog is available, protection against UV/wind/water/debris. 2.Foam padding around inside the glasses for a nice snug fit and skin-friendly. The eyecups are deep enough to not irritate or hinder the dog's eyes. Fully enclosed goggles would make pet eyes wont get wind, dirt, sand damaged or whatever else may fly through the air. 3.Need to adjust two straps to a suitable length, stretch two straps and through dog mouth, take the head strap over the top of head to around under the ears, then adjust the goggles to fit dog face. If not, they easily move all over your doggy snout to touch/interfere dog eyes. 4.eyeglasses great for sticking dog head out of the window while driving in the car, also for outdoor activities such as motorcycle riding, photo booths, travel, daily use, and other outdoor activities. It also a great gift idea for holiday Halloween, Christmas, New Year.