Used one time, too much of a bag for what I need. I do not have the original compression or stuff sack but have it stored in a large sack that gives plenty of room for down to breathe. The Sea to Summit Spark Ultralight Mummy Sleeping Bag 28 Degree is a high-performance sleeping bag designed for minimalist adventurers who prioritize light weight and compact size without sacrificing warmth and comfort. Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate wiggle room for the performance-oriented, backcountry user.