Ultra-light gear is what makes winter backpacking possible. In the past people needed heavy gear to stay warm and that required pulling a sled or polk. The gear was too heavy and bulky to put it all in a backpack. Those days are gone, especially in mild winter temperatures such as are common in the Pacific Northwest. Today it is possible for a 2–3 day winter backpack to weigh between 25–35 pounds (12–16 kg). Everything can fir in a 60-liter pack and the pack itself can weigh as little as two pounds or less. Many ultra-light backpacks in the 2–2.5 lbs range are strong enough and large enough to carry all that you need.