Product Description & Specifications: High Quality Material: dog sunglasses made of quality ultrahard lenses, soft PVC frame, durable and sturdy. Wide glasses frame enough to hold dog head. Bottom breathable vent make air flow and escape moisture to reduce fogging. Protect your pets eyes from snow, UV, wind, dust and fog. UV400 Protect your dog's eyes from external light: UV400 rated lens are essential for filtering out sunlight reflected glare and protecting doggy eyes against long time UV damage. Putting goggles on your dog is the perfect protection if outdoors. Adjustable Strap: The Dog goggles are suitable for medium to large dogs, or some small dogs with large faces/heads, protruding, or even flat faces and long noses. But not suitable for X-small dogs. Product head circumference: 34-45.5cm, jaw: 15-22.5cm (unstretched adjustable range). Product diameter 10cm, height 4cm, lens curvature: 15cm. (No Tensile Measurement) Adjustable nylon high-elasticity elastic band can adapt to fit the size of your pet and the chin strap design let you never worry about falling off. Please measure your dog before purchasing. Comfortable Wearing: Easy to put on and stay on dogs face even when they are running or playing with the other dogs. 2 adjustable elastic straps on head and chin can be adjust to fit dogs. Sponge is padded around the lenses, reduces the pressure on the dog's eyes, give your dog a truly relaxing and comfortable experience. Great for Outdoor: The dog goggles will be a good protection aids for your pet if you want to do some outdoor activities with your pets such as skiing, climbing and swimming etc. Never mind your dog sticking head out of the car/suv window because its eyes have a protection, Hard dog goggles would make pet eyes wont get wind, dirt, sand damaged or whatever else may fly through the air. Specification: Material: AC plastic + EVA + polycarbonate + nylon webbing Product head circumference: 34-45.5cm, jaw: 15-22.5cm (unstretched adjustable range) Product diameter 10cm, height 4cm Lens curvature: 15cm UV protection: UV400