Some say the best way to sleep in a bag is to have no sleepwear on. While fewer clothes can reduce your load, it’s not ideal to sleep naked in your sleeping bag. Your metabolism generates heat, and you need clothes to trap the heat and keep it close to your body. The clothes then work with your sleeping bag to keep you warmer. Depending on the actual conditions, excellent choices include long underwear, one or two layers of loose-fitting top and bottom, socks and hat. Just make sure to wear enough clothes that won’t make you sweat as moisture can take the heat away and make you feel cold. Here are other useful tips to make you feel extra toasty: