I have got a better quality compression sack to hold both my sleeping bag and spare clothes.
I looked at several different models of compression sack but opted for this Lifeventure model as it was the lightest, but with a design that distributed the compression evenly. My Eurohike sleeping bag came with a lightweight compression bag but it only used straps rather than a cap for the compression so there were bulges in the final compressed bag so adding to the size – and I needed a smaller size.
I chose a 15l sack, when a 10l sack may have been large enough, as I was thinking ahead to the multi-day trips I have planned for the future, when I will have to pack extra clothing. On testing it still made a smaller packed size with the sleeping bag and overnight spare clothes than the original sleeping bag compression sack.