When choosing a lightweight sleeping bag for backpacking in the summertime, there are several factors to consider. These include the temperature rating, type of insulation, weight, and features.
Temperature rating: Choose a sleeping bag rated a little bit lower than the typical low temperatures you anticipate on your backpacking trips. For summer backpacking, a sleeping bag with a temperature rating between 20°F and 40°F should be adequate, depending on your location.
Type of insulation: The big choice is down vs. synthetic. Down insulation is lighter and weight-for-weight it’s warmer than synthetic insulation. Down insulates by trapping air and is prized for being light, easy to compress, long-lasting and breathable. However, down fails to insulate when it’s wet. Synthetic insulation, on the other hand, maintains its insulating power in damp conditions.
Weight: The quality of your insulation and the cut of your bag are the big factors when it comes to weight. When you compare weights, compare bags with the same temperature rating. For summer backpacking, look for a lightweight sleeping bag that won’t weigh you down.
Features: Consider the extras that make your bag work best for you, including types of adjustment features, stash pockets, pad compatibility and more.
I hope this information helps you choose a good lightweight sleeping bag for backpacking in the summertime!