Columbia Sportswear jacket featuring their "Interchange System," which means it's a 3-in-1 jacket consisting of a waterproof outer shell and an insulated inner liner that can be worn together or separately. Technology: It incorporates Omni-Tech™ technology for waterproof and breathable protection, as well as Omni-Heat™ thermal reflective lining in some models for warmth. Design: This specific jacket is a full-zip, hooded style, typically designed for youth sizes. Functionality: The Interchange system offers versatility, allowing the wearer to adapt to various weather conditions by wearing the shell, the liner, or both combined. XXS 4/5 This is just the outer shell, no fleece jacket