Sleeping bags with 2-way zipper

Double-sided

— two zippers located on the sides of the sleeping bag, on the right and left. This design simplifies the opening and closing of the sleeping bag as a whole, and also allows you to easily open it for ventilation. In addition, in some cases, a two-way zipper also provides additional possibilities for fastening. The main disadvantage of this option is a slightly higher cost than that of single-sided fasteners. However, the low prevalence of the bilateral design is primarily due to the fact that it appeared relatively recently and is only gaining popularity.