Montbell Backpack Women's Alpine Pack 50 litres - Waterproof Outdoor Travel TrekkingThe birth of Montbell's waterproof trekking pack. The combination of the waterproof inner bag and roll up closure effectively prevents water penetration. Without a top lid, the roll up closure also allows for quick access to your pack's contents. Ushering in a new generation of Backpacks. This model provides excellent stability while maintaining a slim silhouette. Won't hinder your movement for smooth trekking even through narrow mountain trails.