Flap-over-flap design has velcro close for easy on/off and double layer protection for the child's chest area. Grosgrain ribbon at the top of the hood provides adjustability to ensure a snug fit around the head on windy days. Made from polartec classic 300 with DWR from malden mills to insure the best weight-to-warmth ratio possible. Super easy to take on and off. **size is 24 months but my twins were able to use the jacket through 2T since it has the velcro straps.