Product Description Material: Nylon Size: S, M,L, XL S: mouth circumference 12-18cm; neck circumference 18-32cm;M: mouth circumference 14-22cm; neck circumference 20-44cm;XL: mouth circumference 24-32cm; neck circumference 32-64cm; Colour: Black Quantity: 1 piece Package Contents: 1* Pet Eye Mask 1.Made of nylon Made of nylon fabric, lightweight, durable and waterproof, pet hair free and blackout. 2. Relieving pets anxious Calming dog/cat relieving pets anxious emotion, suitable for dog that gets car sickness, Great for rescued dogs. 3. Easy to put on and off: With rubber band on mouth for flexibility, plastic buckle opening, Easily slips over your dog's nose and wraps the neck like a collar. 4.Adjustable size With slider and elastic fit gently for maximum comfort. convinent for using. 5.Apply to Perfect for bathing, trimming dog claws, cleaning ears, and cutting hair, vet visits, grooming, car rides, walks, lightning, fireworks.