We recommend you zip your little one up in the Whirlibird II Interchange Jacket to ensure unimpeded versatility on cool fall hikes or winter days spent at the resort. Designed to keep up with your pint-sized adventurer, this jacket features a 3-in-1 construction that caters to whatever kind of protection she needs. In keeping with its traditional 3-in-1 design, the Whirlibird II boasts an Omni-Tech, waterproof exterior that sheds precipitation quickly and can be worn on its lonesome or with the liner zipped in. The liner's Omni-Tech thermal reflective technology consists of silver dots that reflect her body heat back to her for extra warmth. Additionally, the liner is water-resistant, which means it can shed light rainfall when it's worn on its own.