Silky and luxurious texture. Easy to clean material. Step in design Features: - Step-in strap style harness - Waterproof - Lightweight - Luxurious look and soft rubbery feel  - Front D-ring (for pullers!) - Back D-ring - Buckle attachment on the back with 5 holes for optimal adjustments Sizing:  Please refer to the size chart to find the best size for your dog. For assistance to find your size please email info@cavology.com *in case of doubt, please size up! CHEST GIRTH (inches) CHEST GIRTH (cm) XS 17" - 20" 43 - 50 cm S 20" - 23" 50 - 58 cm M 23" - 26" 58 - 66 cm As reference only: model Milton (13lbs, chest girth 17" Cavalier King Charles) is wearing size XS.