I bought this sleep sack before heading off on el Camino de Santiago. I'd heard that silk was one of the best things I could use to avoid bedbugs when sleeping in hostels. Well 40 sleeps later no bed bugs. Not sure if it was the sleep sack but so glad I had it. I love(d) the color which has held true through several washes. On the hot nights I needed nothing more than my sleep sack and was glad I had the extra-large one as most pillows provided were extra wide and fit well (width-wise) in the pillow extension area of the sack. If I had one suggestion it would be to make that pillow area a bit bigger depth wise.