This briar proof dog vest is made out of the same material we use to manufacture our Stone Creek Clothing line. It is the material that sets Stone Creek clothing apart from the rest. The material is made in the USA. It is extremely tight woven 420 denier nylon that the briars will not penetrate, and the burrs can not stick to. The water beads and runs right of this material. There is also a 100% waterproof liner in the vest. You can rely on this dog vest to save your dog's chest and stomach from those prickly briars and stubborn burrs. The straps are adjustable to give your dog a comfortable fit. The straps are made out of heavy-weight nylon. The nylon is florescent orange for high visibility in the field. The dog vest comes in 3 different sizes. Below is a sizing chart. Any questions, feel free to call us.