1. Material: PVC net + webbing2. Weight: about 45 grams3. Size: XXS, XS, S, M, L, XL4. Mouth circumference: XXS is about 10-13 cm, XS is about 14-17 cm, S is about 18-21 cm, M is about 22-25 cm, L is about 26-29 cm, and XL is about 29-33 cm5. Head circumference: XXS is about 23-27 cm, XS is about 27-32 cm, S is about 32-36 cm, M is about 36-41 cm, L is about 42-47 cm, XL is about 48-56 cm6. Recommended weight: XXS is about 3-5.5 kg, XS is about 6-8.5 kg, S is about 9-12.5 kg, M is about 13-17.5 kg, L is about 18-29 kg, and XL is about 35.5-44 kg.7. Application: long-mouthed dog8. Features: independent heat dissipation, no restraint, free tongue heat dissipation, no influence on drinking and feeding, convenient and simple to wear, adjustable elasticity, safety buckle, exquisite workmanship, anti-scratch, fine edging, beautiful appearance, triangular Fixed, anti-spinning, firmer, safe and environmentally friendly material, comfortable and breathable without stimulation

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