1Z Dog Coat With Built-In Harness - Finally, a protective coat with built-in harness! The 1Z dog coat is a high-tech coat designed like a great ski jacket. The 1Z Coat is secure, warm, waterproof, and washable. The 1Z Coat combines innovative new textiles with an exclusive built-in harness system for an easy, secure and comfortable fit. No more stressing out over putting a bulky harness under or over the coat. Just attach your leash and you are ready to go.