Choose the temperature rating based on the coldest conditions you expect
Decide between down insulation and synthetic insulation
Match the bag shape to your comfort and warmth needs
Check the weight and packed size for your type of travel
Consider the season rating: summer, 3-season, or winter
Look for a hood and draft collar if you need extra warmth
Verify the bag length and width for a proper fit
Compare shell and lining materials for durability and comfort
Check whether the bag is water-resistant or moisture-protective
Make sure the zipper type and placement suit your preference
Consider whether you want a left-zip, right-zip, or zip-together design
Evaluate the fill power if choosing a down sleeping bag
Look at the insulation quality and loft retention
Choose a bag with features that match your sleeping style
Set a budget and compare options within that range
Read reviews for real-world warmth, comfort, and durability
Buy from a reputable brand with a clear warranty and return policy