Premium All-Weather Biothane Material: Waterproof, easy-to-clean, and weather-resistant — perfect for outdoor, wet, and rugged environments. Heavy-Duty Construction: Reinforced stitching and strong hardware ensure durability and reliability for working dogs, training, and tracking. Girth Measurements Large - 30" - 35" Girth Measurements Small - 20" - 25" Girth Measurements Medium - 25" - 30" Redline K-9 All Weather Biothane Dog Harness — Rugged Durability Meets Comfortable Performance