The Koa Dog Collars are made from sublimated polyester, encased in a medical grade urethane, which provides the same benefits of the All Style No Stink Collars. This collar won't harbour dirt, smells and odour causing bacteria, and it's construction is thinner and more flexible than the original ASNS collar. UV resistent, the collar will not fade over time. The Oxford Collection features the ever popular stripe pattern, but in 3 new fantastic colours; Raspberry Sorbet (pink), Alma Mater (blue stripe) and Apple Orchard (green). Smart and stylish, the Koa dog collar is also strong, passing the 1200lb pull test that is carried out on the ASNS waterproof collar range. 100% waterproof.