G'day Stephen,

The Regular and Long size will suit a Medium Sea to Summit Compression Sack.

G'day Ryan,

Unfortunately, I haven't been able to verify this for you as we don't currently have any stock of the sleeping bags to check. Based purely on the listed packed dimensions I think the Small Compression Sack will be a tiny bit small, and you might be better with the Medium Compression Sack.

G'day Ben,

Sea to Summit lists the Large compression sack for the Trailhead Th3 Regular or the X-Large for the Th3-Long. They list the Medium compression sack for the Quest Qu1 Regular or the Large for the Quest Qu1 Long.

G'day Roshan,

Good question, unfortunately Denali are a home brand of another retailer so we don't really have a way of knowing how big/small they are. Your best option will be to select each of the sizes and have a look at the in-use dimensions for their size and then making an estimated guess.

G'day Laura,

We'd recommend the Medium size compression sack for use with the Angel Fire Sleeping Bag.

G'day Jenni,

Thanks for reaching out, the compression sacks have a standard sizing convention across the range in terms of volume. For example, the Compression Sack, Ultra-Sil Compression Sack and Compression Dry Sack Large are all 20L capacity. If you can just fit the doona in a small then I think going up to the medium suit should be suitable. If you're just planning to car camp then the ordinary style should suffice, the Ultra-sil is a little more expensive due to the type of material.

G'day Abdul,

The Coleman Mudge C-3 sleeping bag is not designed to be compressed, so your best bet would be to go with the Sea to Summit Stuff Sack in the 2X Large size.

G'day Liz,

I've tried both and the Marmot Always Summer will easily fit into the Small Compression sack. The Sea to Summit Quest Qu1 is not so compressible and will fit into the Large Compression sack.

G'day Sarah,

It's hard to say because sleeping bags come in so many shapes, sizes and weights. Is your sleeping bag a model that we stock currently? If so I'm happy to go down on the shop floor and work out which size will fit it best. Otherwise, you might have to make an educated guess, you're always welcome to return it if you go for it and it doesn't fit. 

G'day Matthew,

Looking at the dimensions you've provided, I reckon your bag is currently taking up about 22L of space. The Large Sea to Summit Compression Sack has 20L of capacity when at it's largest and the XL is 30L. If you feel you'd be able to cram it into the Large, then it would be a cheaper option but I'd probably recommend going for the XL and then compressing it right down from there.