Seems effective - Exped Waterproof Compression Bag

have a marmot helium bag that really compresses nicely. Original sac was too small and a struggle to push the bag into. Also compresses the bag but compression was also in width which isn't critical to me. This bag compresses my bag to the diameter is much smaller with the width bring closer to my backpack width which is what I was hoping for. In addition my sleeping bag is much easier to put in this bag - makes packing up in the morning a little easier. I push the air out similar to the video but go length wise stating opposite end of the release valve

This review was written in the old system and had content requirements that are different than reviews written today.