1. Eye protection: The dog sunglasses are fixed in place and fit perfectly with adjustable headbands and chin straps, so your dog won't easily take them off. The lightweight and smooth frames won't cause burden cause burden cause any burden on your pet's face and protect your pet's eyes from harm. It is highly recommended for dogs with eye diseases. 2. High - quality materials: The dog glasses are made of soft TPE frames and 2 adjustable flexible bands. The lenses are durable and unbreakable, and can block UV rays. The ventilation holes of the dog sunglasses can help your dog dissipate heat. 3. Great gear for outdoor activities: It is very suitable for daily walks or when your dog sticks its head out of the window while driving, preventing your pet from tearing and providing good vision. These glasses can be used all year round. When your dog plays in the snow in winter, they can also prevent snow and wind. 4. Easy to store: Our dog glasses come with a hard - sided pet glasses case with a zipper, preventing your pet's glasses from being scratched. The beautiful packaging makes it an excellent gift for your dog. 5. Size: Adjustable headband length: 13 inches - 17.5 inches. Adjustable chin strap length: 5 inches - 7.5 inches (excluding elastic measurement), suitable for most small and medium - sized dogs. The widest part of the nose bridge of the glasses is 2.75 inches. Please measure the width of your dog's nose bridge to ensure a perfect fit.