Plaid Active Cut Dog Harness. Keep your pup on the cool front with this classic and stylish plaid pattern harness. Your pet is sure to feel furrocious in this style made exclusively for comfort. Features: – 100% polyester – ‘Comfort fit’, dog body conscious design – Adjustable chest size Sizing: S: Neck: 12 in. Chest: 13 – 18 in. M: Neck: 14 1/4 in. Chest: 16 – 22 1/2 in. L: Neck: 16 1/2 in. Chest: 19 – 27in.