Protect Your Lovely Pet - Our product is designed for visually impaired pets. When your beloved pet wear the blind dog halo, it can protect your pet from collisions with surrounding objects. It's an excellent way for pets to rebuild their confidence. Lightweight Premium Materials - Our product blind dog halo harness is made of soft SBR fabric, aluminum strips and ultra-light EVA. The lightweight design allows your dog to wear it without affecting action due to the weight. Convenience in Small Details - This adjustable dog halo for blind dogs comes attached to a vest harness so your pet can wear it easily without affecting eating and sleeping, and the double buckle design can prevent the product from falling off. Living Happily with Your Pet - This dog vest features a ring clip on top to attach your leash. After dinner you can take your beloved pet out for a walk or play with it like its never been blind. Its the best gift for your pet. Material: aluminum strip + SBR + foam. S = ring diameter 22CM (suitable for 4-10KG) collar circumference 28-40CM, bust circumference 32-45CM; M = ring diameter 33CM (applicable to 13-20KG) collar circumference 32-45CM, bust circumference 36-50CM. The second-generation anti-collision ring can be adjusted back and forth, and the third-generation anti-collision ring can adjust the height back and forth, up and down.