ZI S-Nook Jacket by The North Face

This insulation jacket features highly insulating padding. The padding, which incorporates aerogel for superior heat retention, provides excellent warmth even though it's thin, and offers a comfortable, lightweight feel. The convertible design allows the sleeves to be removed, so it can be worn as a vest. Unbuttoning the dot buttons under the arms of the convertible section also provides ventilation. Furthermore, it can be attached to a ZIP IN ZIP compatible jacket. The outer fabric is water-repellent ripstop nylon, which handles light rain and snow. The hood is built-in. It packs down compactly and comes with a stuff sack for easy carrying. This versatile item can be used in many ways.