Translations:AY Honors/Ultralight Backpacking/Answer Key/68/en
From Pathfinder Wiki
1) Insulation material: Choose a sleeping bag with high-quality insulation material that can provide an optimal warmth to weight ratio.
- Down (goose down): Down is a very efficient and lightweight thermal insulator, often used in high quality sleeping bags due to its excellent warmth to weight ratio.
- Synthetic: synthetic materials such as PrimaLoft or Thinsulate are also popular because they stay warm even in wet conditions and are usually cheaper than down.
- Thermal reflector is an inner layer of fabric which is often also used in sleeping bags or jackets to increase the ability to warm without significantly adding weight. Often used with the aim of reducing the amount of down filling without reducing the warming capacity so that the sleeping bag will be lighter and stay warmer.
- Nylon: For the exterior, nylon is often used because it is light and waterproof. 20-denier nylon is a common choice because of its good resistance to weight.
- Ripstop nylon: Some sleeping bags use ripstop nylon that is treated with DWR (Durable Water Repellent) for added water and tear resistance.
