Whether the seasons have turned colder or you're headed to a higher altitude, bring the Therm-a-Rest Questar 0 Degree Down Sleeping Bag on your next trip for a toasty night's sleep. This mummy bag is insulated with 650-fill down that provides a high warmth-to-weight ratio, so you can easily compress it into your pack and still enjoy its warmth when it's time to make camp. The down has been treated with Nikwax to help it stand up to moisture, and the fabric has a DWR finish to help dew roll off instead of seeping in. The ThermaCapture seams work with zoned insulation to increase warmth retention without adding bulk, and the SynergyLink Connectors allow you to attach your pad for extra insulation. For extra comfort, Therm-a-Rest added its Toe-asis feature that gives your feet an insulated pocket for warmth in your extremities.