This cat bubble backpack carrier increases your pet's visual space via front transparent hard shell, Also the front extra 4" extension helps with ventilation verses non-extension version. ECO-FRIENDLY AND NON-TOXIC PET-SAFE MATERIALS MADE BACKPACK FOR CATS. Light weight and super wear-resistant shell perfectly against biting and scratching by pets. Entire backpack is less than 3 lbs only. Airline Approved and fits under the seat. TWO CARRYING WAYS. Portable and Wearable shoulder pet carrying carrier backpack with adjustable chest buckle for travel and hiking outdoor activity, the real travel backpack for cats. This backpack for cats, great bookbag carrier for cat provides protection for your furry friends. Multiple zippers for expandability. Please see your photos and ask questions. Used once. Has been sanitized. Purchases are shipped daily.