Mountain Hardwear Lamina Sleeping Bag

The 0° F rating indicates the temperature at which the bag is designed to keep an average user alive and comfortable, but individual warmth varies significantly based on your metabolism, sleeping pad insulation, and clothing. For true winter camping, we recommend pairing this with an insulated sleeping pad that has a high R-value to prevent heat loss through the ground.

Traditional sleeping bags are sewn with needles, which create tiny holes that allow heat to escape and moisture to seep in. The Lamina's welded construction eliminates these seams entirely, creating a continuous barrier that prevents cold spots and improves overall thermal efficiency.

Synthetic insulation, like the Temperlite used here, is superior to down when you are dealing with damp or wet conditions. While it is heavier and bulkier than down, it retains its loft and insulating properties even if it gets wet, making it a reliable choice for unpredictable winter weather.

Yes, the Lamina 0 features zip-together functionality, provided you have one bag with a left-hand zipper and one with a right-hand zipper. This is a great feature for couples who want to share body heat during particularly cold nights.

This sleeping bag is designed to fit users up to 78 inches, or 6'6", in height. If you are near this limit, the mummy shape provides a snug fit, so you may want to ensure you have enough room to move comfortably.

Yes, it includes both a compression sack for compact packing on the trail and a mesh storage sack for long-term care. Using the mesh sack at home is crucial, as it allows the insulation to loft fully and prevents it from compressing permanently over time.