Protection for Eyes: Dog sunglasses do stay in place and offer a good fit with both the head and chin straps being adjustable, dog wouldnt take off it easily. The light and smooth frame will not stress your pet's face and protect your pet's eyes from damage. Highly recommended for dog who suffer eyes diseases. Quality Materials: NAMSAN Dog goggles made of soft TPE frame and 2 adjustable flexible straps. Durable and not easily broken, lenses are ultraviolet rays resistant. Dog sunglasses exhaust holes can help your dog dissipate heat. Cool outfit for Outdoor Activities: Perfect for daily walking, or enjoying hanging their head out the window during rides a car, prevent tears from your pet's eyes and provide good eyesight. This goggles can be used all year around and also can protect against snow and wind when your dog play the snow in winter. Easy to store: Our dog goggles is equipped with a hard pet glasses case with zipper to prevent pet glasses from being scratched. A beautiful package is a great gift for your dog. Size: Head strap adjustable length: 13-17.5. Chin strap adjustable length: 5-7.5. (No Tensile Measurement), suitable for most small to medium dogs. the widest of the goggles bridge is 2.75, please measure the dog nose area to fit perfectly.