ALL-AROUND MUZZLE PROTECTION: Once properly in place, the Nylon Dog Muzzle is highly effective at preventing your dog from biting and chewing. HIGH-QUALITY DURABLE: Long-lasting reinforced Nylon stitiching and non-sticky hair breathable Mesh. The Edge of the muzzle has extra soft padding providing the ultimate comfort for your pet. SAFE SECURE: Ergonomically designed safety strapping ensures muzzle will remain securely in place, and features easy to fit and secure Lock-on Buckle ADJUSTABLE BREATHABLE: Adjustable at snout and neck strap. Keep the muzzle tight enough to control his bite, but loose enough to allow freedom to pant and yawn Recommended size: M: Head Circumference: 26 cm / 10.24 inch. Mouth Length: 9 cm / 3.54 inch.