The B-Safe Ultra Infant Car Seat with Cool Flow is designed for safety, comfort and mobility. At Britax, we're making safety cool - your child will enjoy a comfortable ride thanks to our Cool Flow technology. The ventilated mesh fabric improves air flow and the padded seat and head rest ensures added comfort. Safe Center LATCH makes it simple to secure the infant car seat base, while the rideshare-ready European Belt Guide ensures safe installation without the base as needed. In the B-Safe Ultra Car Seat you are surrounded in safety with two layers of side impact protection plus the patented Britax SafeCell Impact Protection system. The SafeCell system includes a steel frame, energy-absorbing base, V-shaped tether to minimize seat rotation and staged-release stitches that slow and reduce forward movement in the event of a collision. The B-Safe Ultra car seat is travel system ready using the Click & Go system and it's compatible with Britax B-Agile, B-Free, B-Mobile and B-Ready Strollers. This infant car seat can be used rear-facing 4-35 pounds. Car seat dimensions 17.75 W x 25 H x 30.62 D inches. Child standing height 32" or less. Seat width 8.75".