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 for chest areas This dog weight pulling harness is a training tool designed to help improve your dog's behavior and build muscle and strength in a safe and controlled manner; suitable for both pet dogs and working dogs Package Includes: 1 x Weight Pulling Harness Size Details: M: Neck 11.5–15.5 in (29–40 cm); Chest (Girth) 19.5–27.5 in (50–70 cm); Back 19–22.5 in (48–57 cm) L: Neck 15–19 in (38–48 cm); Chest (Girth) 23.5–31.5 in (60–80 cm); Back 19.5–25 in (50–64 cm) XL: Neck 18–21 in (46–54 cm); Chest (Girth) 27.5–35.5 in (70–90 cm); Back 21.5–26 in (55–66 cm) 2XL: Neck 21–25 in (54–64 cm); Chest (Girth) 31.5–39.5 in (80–100 cm); Back 23.5–28.5 in (60–73 cm) 3XL: Neck 25–29 in (64–74 cm); Chest (Girth) 35.5–43.5 in (90–110 cm); Back 25–30 in (63–76 cm)