Jeremy Collettwrote a review of Sea To Summit Lightweight Dry Sack on June 30, 2017
Familiarity: I've used it several times
These dry bags are awesome. They are lightweight yet (still feel pretty durable), and keep their contents dry. They come in many sizes so they are super versatile. I use the 13L as a food bag for 3-5 day backpacking trips and the 8L for my 30 degree down sleeping bag. These bags are a great way to waterproof your backpacking setup, and could be also be used as stuffsacks inside a larger drybag on river trips, although they don't seem like they are durable enough to be used on their own on river trips.