Scientifically designed. Alternating black & white panels create a “flash” when thrown that is highly visible to dogs. The MOMARSH Pro-Performance dog training bumpers have been engineered from the ground up to provide durability, comfort and performance when training your retriever. The tough, soft, buoyant EVA Foam is easy to throw, easy on your dog’s mouth and is consistent in any weather condition. The innovative pentagonal shape is easy for your dog to hold, stackable and won’t roll off flat surfaces. Designed by Veterinarians and Professional Dog Trainers.