The Chicco Bi-Seat i-Size Air Without Base in Black Melange is a versatile car seat designed for children from approximately 6 months to 12 years old (61–150 cm). It offers three phases of use: rear-facing (61–105 cm, ~3 months to 4 years) with an optional 360° i-Size base (sold separately), forward-facing (76–105 cm, ~15 months to 4 years) with the same base, and booster mode (100–150 cm, ~3 to 12 years) using the vehicle's 3-point seat belt and ISOFIX connectors. Key features include 360° rotation for easy installation, 5 reclining positions for comfort, an adjustable harness and headrest that grow with the child, and enhanced airflow through 3D mesh fabric and ventilation channels. The seat's dimensions are 44.5 x 46.0 x 58.5 cm, and it weighs approximately 8 kg, providing a flexible, safe, and comfortable solution for long-term use.