Montbell Versalite Jacket Women's Collection/Ski Poles Features a narrow mouth to

Features a narrow mouth to allow for easier drinking from the Clear Bottle (sold separately)

and while traveling

The layer closest to your skin pulls moisture away and moves it to the outer layer allowing the layer of air to maintain more consistently warm temperature

just insert poles and extend

Montbell Versalite Jacket Women's Collection/Ski Poles Features a narrow mouth toFeatures an extremely thin face fabric and Montbell's proprietary waterproof, highly breathable Dry Tec. While maintaining essential features for mountaineering, the minimalist design achieves an ultralight performance. The interior features a densely knitted fabric to ensure cling resistant comfort.