Mountain Hardwear UltraLaminina 32 Regular Sleeping Bag,Green,Regular Synthetic Increased insulation to set temperature ratings to T-Comfort for warmer Women's bags Engineered to be lightest and warmest synthetic bag available. Performance mummy cut is snug, reducing girth, weight, and bulk and maximizing thermal efficiency. Proprietary welded Lamina construction enhances loft and eliminates cold spots Ultralight shell is soft and highly wind resistant