Cold-weather camping is easy when you have a Coleman Big Bay 40 Degree Big and Tall Contour Sleeping Bag. From treks out for a car camping trip to stargazing nights in the backyard, this sleeping bag's Coletherm insulation will keep you warm in temps as low as 40 degrees F. Tend to run cold The cinched hood pulls double-duty as both a headrest and an extra source of warmth, and the Thermolock draft tube helps to lock in heat so you stay comfortable when the temps drop.