Copper K8 Optix with gold mirror paw lens. 100% UV block, wide nose bridge, shatterproof lens. These sunglasses are designed specifically for dogs! Gold paw rhinestones on the lens and comfortable plastic bone side 'arms'. Unique three strap system, adjustable head and chin straps to keep sunglasses in place.For the dogs with the common eye disease Pannus who should stay out of direct sunlight or just wanting to be cool!!Training tips:•Don't put doggles on your dog while indoors. Imagine yourself wearing dark tinted glasses inside you would not see clearly neither would your dog!•When first put on reassure your dog, do not let hinm paw at glasses or roll to get them off. Take him to sunlight and he will realise he can see with them on. Walk around to occupy his mind.•Try to go through this routine regularly so he can adjust to wearing them.Size:• XS - Head strap and frame: 5ins - 13ins Chin strap - 3ins - 7ins Breed example: Chihuahua• S - Head strap and frame: 12ins - 20ins Chin strap - 4ins - 8ins Breed example: Westie