Choosing the right sleeping bag can be surprisingly overwhelming once you start comparing fill power, temperature ratings, and weight across different models. To make that decision easier, we've put together a completely free, downloadable sleeping bag comparison guide, covering every sleeping bag we stock with a full breakdown of specs, so you can compare your options side by side before you buy.

What's inside the sleeping bag guide

Rather than jumping between dozens of individual product pages, our guide brings everything into one place. It covers fill power, temperature ratings, weight, and packed size for every sleeping bag in our range, giving you a genuine side-by-side comparison rather than a sales pitch. Whether you're after something for a mild overnight camp or a serious alpine trip, the guide is designed to help you match a bag to your actual conditions, not just the one with the flashiest description.

Our best-selling sleeping bags

While the guide covers our full range, a few bags consistently stand out as customer favourites. The Sea to Summit Spark Down Sleeping Bag is our lightest option, using premium down fill to deliver serious warmth for minimal weight, making it a go-to for hikers who count every gram. Stepping up, the Sea to Summit Spark Pro Down Sleeping Bag adds a touch more warmth and refinement, combining 900+ fillpower goose down with a Free Flow Zip System that lets you vent on warmer nights or open the bag flat as a quilt.

Not sure which one actually suits you? We've compared the two directly in our guide, Sea to Summit Spark vs Spark Pro, covering the differences in warmth, weight, and features side by side.

Stepping up in warmth and versatility

For hikers wanting a bit more room and versatility, the Sea to Summit Ascent Down Sleeping Bag is another standout in our range. It uses 750+ fillpower Ultra-Dry goose down and a more relaxed mummy fit than the Spark range, along with the same Free Flow Zip System for temperature regulation. It can even be worn as a jacket around camp by snapping the shoulders and unzipping the footbox, making it one of the more genuinely versatile bags we stock. The Ascent is also available in a dedicated women's version, designed with the same features in a fit that better suits a woman's body shape.

If you're deciding between the Spark and Ascent, we've broken down exactly how they compare in our guide, Spark vs Ascent: which Sea to Summit sleeping bag wins.

What to look for before you buy

Beyond comparing individual bags, it helps to understand the fundamentals of what actually makes a good sleeping bag. Fill power, temperature ratings, and shell material all play a part in how a bag performs in real conditions, and getting these details right matters more than picking based on price alone. We've covered exactly what to check before you buy in our guide, what to look for in a sleeping bag before you buy.

Why shop with us at PAST Outdoors

We're a family-owned Australian outdoor retailer with a genuine passion for helping people get outdoors properly equipped. Our team tests and uses the gear we sell, so when we put together a resource like our sleeping bag guide, it's based on real product knowledge, not just spec sheets pulled from a supplier. We're proud to stock trusted brands like Sea to Summit, and back every purchase with honest advice from people who actually spend time outdoors.

Thousands of hikers and campers across Australia have trusted us to kit them out for everything from weekend getaways to serious multi-day expeditions, and our customers keep coming back because we get the details right. Download our free sleeping bag guide today to compare your options, or reach out to our team for personalised recommendations. We're here to help you find the right bag, and sleep well wherever the trail takes you.

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