Front & Back Dual Expandable Polarized Cat Backpack Carrier for Large Cats up to 20 Pounds The front expandable design increases your pet's visual space with a front transparent hard shell, and the front expansion fixes ventilation and heat issues compared with non-expandable versions. This carrier is built for large and fat cats, up to 20 pounds, with a 4 inch front extension that creates a bigger, roomier interior. Key benefits and features - Large cat compatibility: supports cats up to 20 pounds. The 4 inch front extension provides extra room for bigger or growing cats, improving comfort on longer outings. - Enhanced ventilation and visibility: front transparent hard shell expands the pet’s space while maintaining airflow and visibility, reducing stress and overheating. - Safe, eco-friendly materials: made from non-toxic, pet-safe materials. Lightweight yet wear-resistant, the shell resists biting and scratching. - Lightweight design: total backpack weight is under 3 pounds, making it easy to carry on all kinds of trips. - Airline approved and travel friendly: designed to fit under the seat on most standard airplanes for convenient air travel with your cat. - Dual carrying options: two practical ways to use the carrier for different activities: - Shoulder carrier: wearable design with an adjustable chest buckle for secure travel. - Backpack carrier: traditional backpack style with adjustable straps for hands-free use during hiking or daily travel. Specific attributes - Function and space: front expandable section increases internal space for a more comfortable interior, while the front transparent shell provides visual access and a sense of openness for your cat. - Compatibility and size: suitable for large cats up to 20 pounds, with a 4 inch front extension to accommodate bigger pets. - Material and durability: eco-friendly, non-toxic materials; lightweight and wear-resistant shell designed to withstand pet biting and scratching. - Performance: dual design improves ventilation and reduces heat buildup compared to non-expandable models; supports comfortable travel over longer periods. - Weight and portability: overall weight under 3 pounds, easy to carry for daily use, trips, or excursions. - Travel readiness: airline approved and fits under the seat, making it practical for air travel. Use scenarios - Air travel and trains: take your cat on flights or long-distance trips with confidence. The under-seat fit and expandable space help reduce stress while keeping your pet comfortable. - Outdoor activities and hikes: use the backpack carrying option to keep your hands free while you explore trails, parks, or urban outings with your cat safely close. - Vet visits and daily errands: the two carrying modes provide flexibility for routine trips to the vet, pet stores, or commuting, ensuring a calm and controlled environment for your cat. This dual expandable cat backpack carrier combines practical design with safety and comfort, providing a larger interior for big or growing cats, improved ventilation, and versatile carrying options for travel and outdoor activities.