They stink, look dirty and cause skin irritations.
Not C4. C4 Collars are ultra-durable and mega-comfortable. Made of medical grade thermo-elastomer, C4 collars are non-porous which makes them waterproof, stain resistant, hypoallergenic, and easily washable.Golden Retriver Collar With Silver Buckle - Medium Most Collars stay wet and are like sponges for dirt, grime, and bacteria.