ThinkPet Outdoor Waterproof Breathable Lightweight Quick Release Medium and Large Dog Backpack Saddle Bag, Perfect for Camping Hiking and Hunting with Your Dog Breathable - Made of high quality mesh material, very breathable Waterproof - Bags are made of waterproof fabric, keep items dry while raining Reflective - Reflective stripes on bag ensure good visibility at night Top Handle - Help your dog over difficult terrain by top handle Chest Girth: 27.5-35.5 Inch