Mountain Hardwear Lamina 45 Synthetic Sleeping Bag:

The Mountain Hardwear Lamina™ 45 is an ultra lightweight sleeping bag for cool but not wintery condiions.

The Lamina 45  is build around a welded layer construction that maintains loft in the bag through repeated washings and compression cycles.

Mountain Hardwear's ThermicMicro™ fill insulation is very roomy while being soft against the skin, keeping you completely comfortable and away from the coldness outside the bag.
 
Fitted with a face gasket and Ergo draft collar, the Lamina 45 is a technically better insulated bag designed to keep the heat your body releases in the bag, so you don't lose any thermoregulation during the night.

At a lightweight 788g, the Lamina 45 is a super lightweight late summer/autumnal sleeping bag.