Size and fit - Three options: M, L, XL. Please refer to the size chart and select the right size. These sizes suit medium to large dogs for professional training, hiking, and walking, including breeds such as German Shepherds, Belgian Malinois, Golden Retrievers, Huskies, Labradors, Akita Retrievers, and similar. Durable construction and materials - Front clip working dog vest built to last with 1050D nylon and sturdy stitching. Breathable mesh inner layer keeps your dog comfortable. - Two heavy-duty metal shoulder buckles withstand strong pulling, offering better control during training, hunting, and work, and helping prevent escape. Safety and visibility - Reflective strip design improves visibility at night for dogs and pedestrians. Airtag tracking - Chest pocket for an Airtag that does not interfere with activity, enabling easy location tracking and reducing worry of loss. Use scenarios - Professional training sessions with handlers. - Long hikes and outdoor adventures. - Daily walks in low light or busy environments.