Crucial for cold nights to trap heat escaping from your head.
Choose a bag with a rating 10–15°F lower than the coldest temperature you expect to encounter. 2. Choosing Insulation: Down vs. Synthetic how to buy a sleeping bag
Look for durable, water-resistant fabrics like nylon or polyester with a DWR (durable water repellent) finish. Crucial for cold nights to trap heat escaping from your head
Generally cheaper, hypoallergenic, and continues to insulate even when damp. The downside is that it is bulkier and heavier than down and its warmth can diminish over time as fibers break down. 3. Finding the Right Shape Choosing Insulation: Down vs
The fill material determines the bag's weight, compressibility, and performance in wet weather.
A survival-only rating indicating the temperature at which a standard woman can survive for six hours without hypothermia; it is not a comfort guide.
Temperature ratings are estimates and vary by person, but industry standards (ISO/EN) provide a baseline for comparison.