GEWALK GUARDMAX GUARD MAX Insect Repellent Material Insect Repellent Function T-shirt for Medium-sized Dogs, 2XL, Gray. I have opened it and tried it on once, but I am selling it because the size doesn't fit. For my 24kg chubby Border Collie, the chest and arm areas were quite narrow, and it surprisingly lacked stretch. - Brand: GEWALK - Size: 2XL - Color: Gray - Back Length: 50cm - Chest: 67-73cm - Neck: 41-45cm - Material: 100% Polyester - Function: Insect Repellent Thank you for looking. Type... T-shirt