Comfortable to wear: padded shoulder straps reduce back and shoulder pressure, breathable material. Safety straps easy to adjust, more secure. Premium pet backpack designed with maximum comfort for you and your pet. Anti-leak hook inside the bag to attach to the pet collar, prevent it co.ukom jumping. Good ventilation: large mesh windows on both sides and the top of the backpack provide enough oxygen, a side zipper opening, easy for pets to get in and out. The removable mat makes it comfortable for pets. Practical pocket to hold a water bottle and poop bags. Size S about 32 * 30 * 25cm (length * width * height), the pet backpack is more suitable for cats and small animals under 3kg; Size L about 45 * 36 * 30cm. (Length * width * height), the pet backpack is more suitable for cats and small dogs of medium breeds under 6kg.