Me and my girlfriend just bought 2 of these for fun. They actually zip together making one big space. Super light and soft we are using one right now on the bed for summer sheets.
The bag is a little tight though and flimsy. I would imagine day after day of stuffing this would render the bag useless in a few months. Though maybe another small sac would do the trick!
Also comes with a spot pre-stiched for a pillow ohhh ahhh he don't knock it ever had you pillow taken in the night!
Just ordered these for a upcoming trip to Bali and I was pleasantly surprised by the size and spaciousness of the cocoon. I'll wait to see how it keeps out the little buggies but for the most part it feels really breathable and really comfortable.