Mountain Hardwear - Lamina 45 Sleeping Bag. A warm, affordable, and water-repellent synthetic bag, with unique Lamina construction for ultimate warmth 45 F/7 C. A warm synthetic bag with Thermal.Q insulation is both compressible and durable. Welded Lamina construction enhances loft and eliminates cold spots. Soft polyester lining wicks away moisture and lightweight nylon shell repels water. Full-length durable #8 zipper has double sliders for ventilation.