Small and Suitable for Pets: The backpack is small and suitable for pets weighing no more than 5 pounds. Dog backpack is designed for carrying puppies and kittens. We recommend it to puppies under 5 pounds (larger dogs may be too heavy for owners). Wide strap: The wide and comfortable strap design effectively eliminates the pressure on you, saves effort and peace of mind, and gives your pet a comfortable space. Design and size: The large size is 44x40cm/17.3x15.7in, and the small size is 40x35cm/15.7x13.7in.Breathable cotton canvas design makes every pet in the bag feel fresh; The circumference can be adjusted by buttons, and the maximum opening can be adjusted to 7 inches, giving the family a panoramic vision. Safe and comfortable: The puppy carrier has double-shoulder strap, which is safe and firm, and the safety button on the back bag can prevent pets from falling accidentally. Made of soft and breathable canvas, it provides a comfortable and skin-friendly place for your pets to spend time with them. Universal Use: Dog Cat Hand Free Sling Carrier help you take your four-legged friend into the mall, grocery stores, hospitals, parks and go for daily walk or a long distance walk.