Pat Gunningwrote a review of Sea To Summit Ultra-Sil Stuff Sack on January 18, 2016
Familiarity: I've put it through the wringer
I have several of these for puffy jackets that can't be stuffed in a pocket. The 4L size is perfect for full jackets and pants. The 2.5 is great for vests. I really like how they come in different colors so I know which jacket or pants I am pulling out.