The Lamina Z-Spark sleeping bag from Mountain Hardwear has been designed to eliminate any cold spots, so that you won't wake up from the cold in the middle of the night. The Z-spark has a welded Lamina construction that prevents the Thermal.Q micro synthetic insulation from moving around while you sleep. Along with the extra mapped insulation that's concentrated around your core and feet, the Lamina Z-Spark protects your areas that most susceptible to heat loss.
A great fit and plenty of useful features
The Lamina Z-Spark comes in the comfort mummy shape and has a cozy polyester lining. There's a footbox for enhanced insulation and a roomier fit when you're sleeping, while the face gasket has a tailored hood that prevents heat from escaping. The full-length zipper makes getting in and out of the bag easy and there is also a zippered shoulder pocket so you have a place to store your valuables.
The bag is finished with a Lamina nylon shell and DWR treatment that helps to repel away water and condensation while you're asleep.
Not sure on the right sleeping bag to choose? Check out our Sleeping Bag Buying Guide.