Though sturdy and durable, C4 collars are pliable and ergonomically designed so they are super comfy and a pleasure for your pup to wear! Antimicrobial & Odor Proof Their impervious and non-porous material prevents the growth of microorganisms and bacteria that are unhealthy for your dog and generate really bad odors (ever smelled a nylon collar?) 100% Water Resistant & Washable Your pup can be free to splash and play in the mud to their hearts content! C4 Collars can be easily and quickly hand-washed in the sink with light soap. Pick a Belt to Match Mix and match your favorite belt with your pup's collar!