I got this as a gift and have never used it. I already have two bivy sacks which is why Im selling it. This is how black diamond describes it:

A cold-weather Superlight bivy sack, the versatile Winter Bivy is built from water-resistant Epic by Nextec fabric that keeps weight at an absolute minimum and packs down incredibly small, so you can tuck it away for an emergency shelter or add it to your gear as a sleeping bag cover. Built with a zippered entry across the shoulders, it’s easy to get into and use while sitting up. Weight: 9.8 oz.
Dimensions: 85" x 35"
Floor Area: 14 sq.ft It sells for $130 and I'll sell mine for $100 or you can make me an offer.