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
Look for durable, water-resistant fabrics like nylon or polyester with a DWR (durable water repellent) finish. how to buy a sleeping bag
Shape affects how much heat the bag retains and how much room you have to move. how to buy a sleeping bag
Most bags come in "Regular" (up to 6') and "Long" (up to 6'6"). Avoid a bag that is too long, as your body will have to work harder to heat the extra empty space. How to choose a sleeping bag - MEC how to buy a sleeping bag