Protect Dog's Eyes: Provides UV protection, waterproof and windproof; suitable for having eye disease dogs. Perfect for dogs who love car rides, hiking or outdoor activities. High Quality: Made of TPU, silicone frame and elastic nylon straps; the soft silicone lining allows the lens not to close the eyes too much, no pressure to wear, and the pet will easily adapt to the sunglasses. Easy to wear: the dog glasses provide a secure fit with an adjustable elastic head strap and chin straps, which prevents the glasses from moving even when your dog shakes the body. Specially Designed: The design of the dog sunglasses takes into Counts the dog's face and nose, devotes the glasses to the frame and nose bridge more fit the contour of the dog, provides excellent wearing feeling. When you wear glasses for your pet , please adjust the straps to avoid slipping. Full head circumference: 34cm-46cm (unstretched and adjustable) Lower jaw: 15cm-23cm (unstretched and adjustable)