JRwrote a review of Mountain Hardwear Lamina 20 Sleeping Bag: 20 Degree Synthetic on July 2, 2011
Used this bag on a two day (wet) trip in northern Michigan with night time temps in the 50s. Very comfortably warm. In my mind one of the main selling points is the compressibility and loft. Compresses VERY small in the supplied compression sack and fits very easily in the bottom of a 70 L Osprey backpack.