OctoRose Durable Large Size Silky Satin Cocoon Sack Sleep Bag Sheet for Travel Hotel Sleep Over Camping Sleep Bag Inner Protector and Flat Sheet Alternative 95 in x 42 in (Sliver Gray)This is single fabric layer, NOT outdoor sleep bag which has fill in. Yes, it can be used as inner layer of sleep bag to enhance warm and protect sleep bag. Mostly us..