【RECOMMENDED FOR 2LB 【PRECISE SIZE FIT】Four sizes are provided to meet diverse needs. The recommended weight of the front dog backpack carrier is for reference only. Before purchasing, be sure to measure your pet'sLENGTH and CHEST GIRTH first. If the corresponding sizes of the two measurements are inconsistent, choose the larger size to ensure your pet's comfortable travel.【ACCLIMATE YOUR PET】: Before the first use, gradually acclimate your pet to the backpack. Have it wear the backpack for short periods at home, gradually increasing the wearing time so it can getto the feeling of being in the backpack【TWO WEARING OPTIONS WITH LESS BURDEN】: The hands-free pet carrier backpack offers two wearing options. Worn on the front, it facilitates effortless interaction with your beloved pet, nurturing a deeper bond between you both. Worn on the back, it allows both you to enjoy diverse scenery. Meanwhile, the thickened sponge pad helps tothe burden of your shoulder【COMFORTABLE AND BREATHABLE】:pet carrier backpack features a elastic strap, legs-out and tail-out design to ensure maximum comfort for your furry friend. What's more, the breathable mesh promotes ventilation, keeping both you and your pet cool and comfortable, fostering a closer bond during your travel, hiking and adventures