Recommended safety system for a prong collar. This leash is made so that a prong collar is attached to one snap and dominant dog collar (or backup collar) is attached to second snap. There is a 6 inch tab attached to snap end of the leash for that 2nd collar. When or if the prong collar fails and comes off the dog, the second collar is already attached without interfering with the prong collar corrections. Adventure dog collars and prong collars are not included. Waterproof, dirt proof, odor proof and durable? Sounds too good to be true. Our biothane collars and leashes are made of pvc coated webbing giving it the look and feel of leather. Finished with top of the line nickel hardware, it's sure to last forever. If it gets dirty, simply rinse it with water and some soap to make it brand new. This product is covered by a lifetime warranty.