* 【Holds pets up to 20 lbs】 - ALBINA Dog Backpack measures 20.47×12.99×9.84 inches (52×33×25 cm), suitable for pets up to 20 lbs. * 【Hard Waterproof EVA Base】 - It will be heavier than a regular bag, The backpack itself weighs 4 pounds. The hard EVA base enhances pets' security and stability during climbing, traveling, or other outdoor activities. It allows the puppy to stand or lie down. The pet carrier features a built-in muck-proof partition board that can be washed separately. * 【Optimal Ventilation】 - The sides and top of the dog/cat carrier backpack are designed with ventilated mesh holes, ensuring air circulation. This design allows your pets to stay in the backpack while enjoying the scenery outside simultaneously. * 【Separate Laptop Compartment】 - The dog backpack includes a dedicated compartment for a laptop, books, and essentials, along with an external hanging loop. The pet backpack carrier has an external waterproof feature, preventing your pets and office supplies from getting wet in wet weather. * 【Side Pocket and Front Hand Carry Design】 - Placing a fan or ice pack into the side pocket achieves effective cooling for your pet in hot summer weather, while a heating bag can be used to increase indoor temperature in winter. The waistband can hold snacks or keys. The dog carrier backpack features a front handle, allowing you to place the backpack upside down on the ground to facilitate your pet's activities.