Marmot CBS 30°F or lower down Sleeping Bag – WARM simi rectangular cant find the model number it is a simi rectangular with pocket in bottom for mattress and pillow DOWN stay’s on top and sides your insulated mattress fits in the lower sleeve. Very light and puffy. Condition is excellent makes an excellent quilt full length zipper both sides bag says fat city zip pad. I do not have the pad but any good insulated pad should work. Bet you wont find another good luck.