Spacious and Expandable Design: Dual-sided expansion from 15.5"×8"×13" (compact) to 32"×13"×14" (spacious) provides adjustable space for pets up to 22 lbs. Ultra-lightweight at 1.8 lbs (810g), it transitions seamlessly from daily commutes to hiking adventures. (When selecting a carrier, please do not rely solely on your pet's weight. Measure their height, length, and width to ensure a comfortable fit.) Durable & Breathable Materials: Crafted with waterproof fabric and mesh vents, this backpack dog carrier airline approved model keeps pets cool and secure. The soft fleece-lined interior ensures comfort, while the 15.5" base fits under most airline seats for stress-free travel. Interactive & Convenient: This small dog carrier backpack features a breathable skylight for interaction and a luggage strap for easy travel. It folds flat via a bottom zipper for storage and offers a 360° multi-pocket design (6 pockets total) to hold treats, leashes, and bowls. Multiple Carrying Options with Comfort: Functioning as a versatile expandable cat carrier backpack, shoulder bag, or tote, it adapts to your travel needs. Thick padded straps reduce pressure for your comfort during extended use, while the internal safety leash prevents your pet from escaping. Luxury Space for Small-Medium Pets: Designed as a sturdy dog backpack carrier supporting 25 lbs, it is Best for pets under 18 lbs for maximum comfort (e.g., Shih Tzus, Ragdolls). The 32" expandable area offers a "business class" experience to stretch out during trips. Transform your pet transportation experience with this innovative cat carrier backpack, perfect for adventures with your feline friend. This versatile carrier combines the functionality of a traditional pet carrier with the convenience of a backpack, making it ideal for travel, hiking, and camping trips. The hands-free design allows you to carry your cat comfortably while keeping your arms free for other activities. Features multiple ventilation points to ensure your pet stays comfortable during transport. The durable construction provides a secure space for your cat, while the padded shoulder straps offer comfort for the carrier. Whether you're heading to the vet, taking a weekend camping trip, or exploring new trails, this carrier backpack keeps your furry companion safe and close. The spacious interior gives your cat room to move while maintaining a compact profile that's easy to manage. Make every journey with your pet more enjoyable with this practical and stylish carrier backpack.