If you want the collar to serve long, get the metal collar and save your money as it is going to serve for years! Such product is extremely durable so it can withstand loads of hard training or active walking. Metal collars are corrosion resistant so they will not get spoiled in their look or functionality if they are used in area with high humidity level. It is very hard for the dog to break this collar. These collars are easy in use and easily adjustable. Just choose the correct size for your Labrador and start training!