Material: Nylon + Polyester 4 Colors: Red, Yellow, Black, Blue 5 Sizes: M to 3XL Features: Durable nylon surface with soft waterproof padding, comfortable to wear Reflective design for increased visibility and safety during nighttime use Neck with wider padding strips, soft, breathable, and tear-resistant; provides comfort and safety around chest area This dog weight pulling harness is a training tool designed to help improve your dog's behavior and build muscle strength in a safe and effective way. Suitable for both pet dogs and working dogs Package Includes: 1 x Weight Pulling Harness Size Details: M: Neck 11.5–15.5" (29–40 cm); Chest (Girth) 19.5–27.5" (50–70 cm); Back 19–22.5" (48–57 cm) L: Neck 15–19" (38–48 cm); Chest (Girth) 23.5–31.5" (60–80 cm); Back 19.5–25" (50–64 cm) XL: Neck 18–21" (46–54 cm); Chest (Girth) 27.5–35.5" (70–90 cm); Back 21.5–26" (55–66 cm) 2XL: Neck 21–25" (54–64 cm); Chest (Girth) 31.5–39.5" (80–100 cm); Back 23.5–28.5" (60–73 cm) 3XL: Neck 25–29" (64–74 cm); Chest (Girth) 35.5–43.5" (90–110 cm); Back 25–30" (63–76 cm)