pparkPets i-Series dog collar is a standard flat nylon pet collar with quick-release buckle. It is made with the best high quality nylon and woven finely to give you and your dog a nice sensation at touch. It is extremely soft and silky and we make sure that the stitching is well made and it does not itch nor sting when it is worn. We even used a special pattern that strengthen the stitching without impairing the comfort when wearing the collar. The lockable buckle is designed in a way that makes it really hard to break; it also features a lock sliding button so that it is virtually impossible to be opened unwillingly or to be opened by a dog. The lockable buckle is not available on XS and S sizes. It comes in 32 different colors to match your dog"s mood every day. It is available in 5 different sizes for best fitting and it is easy to adjust for best comfort.