Slobber straps can take a lot of everyday wear and tear off of expensive reins. For example, if a horse takes a drink while wearing reins with slobber straps, the slobber straps will help keep the reins out of the water. They are designed to be easily removed and replaced. Slobber straps can add enough weight that both horse and rider can more easily feel communication through the reins.Some styles of reins, such as mecates, are not easily attached directly to a bit. In this case, the slobber strap is attached to the bit and the mecate is attached to the slobber strap.