【Material】: This model uses high quality anti-ultraviolet polarized lenses, the frame is made of PVC, soft and elastic, suitable for dogs and pets and comfortable to wear. Protect your pet’s eyes from snow, UV rays, wind, dust and fog. Adjustable Strap: With adjustable strap. The strap is made of an elastic cotton band, an adjustable elastic cord that adapts to different head shapes. So your pets can wear the sunglasses comfortably and firmly. Good protection for outdoor activities: The dog glasses are good protection for your pet when you want to do outdoor activities. outdoor activities like skiing, climbing, swimming, etc. 【Sponge cushion interior】: the sponge is padded around the glasses, the high density sponge is very breathable and the thermal performance relieves eye fatigue or pressure on the shaft, and the dog is generally not uncomfortable. Usage: This type of sunglasses is suitable for medium-sized dogs. It is recommended to wear animals with a head circumference of 33-38