Two-way main zipper lets you zip two bags together. A single bag can be zipped open to make a full-size blanket. Durable shell and liner materials are soft against your skin. A lightweight and warm sleeping bag that provides cosy comfort on cool nights at the campsite. If you’re sleeping in clothes, try to make sure they’re clean. Over time, body oils, sweat, and dirt can create a musty smell and break down your bag liner. Stay warm and wrapped up in this spacious square-shaped sleeping bag, keeping in your heat for those nights when there is a chill in the air and then unzip fully for a duvet-style sleeping experience so that you can stay cool and comfortable when the summer nights roll in. Please remember that everyone feels the hot and cold differently. Always go with your personal preference.