Recently used 1 med two small Thule ones purchased at REI in a 40L Patagonia Black Hole Duffel for a 10 day trip MCI to ACE (Canary Islands).

The denier of the fabric, the ability to test pack in the store and the use of YKK zipper knocked me over the top.

I started with ebag std cubes then went to the specter line of Eagle Creek. If they had EC compressions ones at the store when I was buying, it may have been a different choice, The REI braned ones were decent but clearly not nearly as well made as the Thules.