The I GO 2 Multi-Function Pet Carrier is the most innovative pet carrier on the market. Each of the models offer a rolling case, backpack, hand bag tote, shoulder carrier and dog booster seat. The top of the line I GO 2 Weekender Multi Pet Carrier features a hard shell. Soft pet carriers include the I Go 2 Traveler Plus Multi Pet Carrier, I GO 2 Traveler Multi Pet Carrier, I GO 2 Escort Multi Pet Carrier, I GO 2 Day Tripper Multi Pet Carrier and I GO 2 Sport Multi Pet Carrier.