One Planet NZ — Australian Sleeping Bags Built for the Southern Hemisp

Q: Is One Planet a good sleeping bag brand for NZ?

Yes. One Planet is an Australian brand specifically designed for Southern Hemisphere conditions, making their bags well-suited to New Zealand tramping. They are Dwights NZ top sleeping bag recommendation.

Q: What is the difference between the Sonder and Nitrous zip?

The Sonder has an L-shaped zip that runs through the footbox, allowing the bag to open completely flat. The Nitrous has a near full-length zip that stops short of the footbox, keeping the footbox sealed for better warmth.

Q: What One Planet bag suits NZ wet conditions?

The Rumour is the best One Planet bag for wet NZ conditions. It features welded seam technology and a Pertex Quantum Pro shell that is waterproof, windproof and breathable — ideal for tarp camping and exposed alpine conditions.

Q: What temperature rating do I need for a NZ Great Walk?

For summer Great Walks a -3 to -5 degrees bag suits most trampers. For shoulder season a -5 to -8 degrees bag is recommended. NZ conditions are generally colder than ISO ratings assume, so it pays to size up.

Q: Does Dwights stock the full One Planet range in NZ?

Yes. Dwights is an authorised One Planet stockist in New Zealand. The full range including Nitrous, Sonder, Cocoon, Rumour, Bungle, Bush Lite and Summit is available at dwights.co.nz.

One Planet is an Australian brand with a well-earned reputation for sleeping bags engineered for the Southern Hemisphere. While many global brands design around European or North American conditions, One Planet bags are built with the demands of Australian and New Zealand wilderness in mind — unpredictable weather, high humidity, and temperatures that can swing dramatically overnight. At Dwights, we stock the full One Planet range and consider them our lead sleeping bag recommendation for NZ trampers. If you are looking for a sleeping bag designed to perform in real Southern Hemisphere conditions, browse the full One Planet range at Dwights. Why One Planet Suits NZ Tramping New Zealand tramping conditions are unlike anything you will find in the Northern Hemisphere. Even in summer, NZ mountains can deliver rain, wind, and cold snaps within the space of a few hours. Hut camping on Great Walks like the Milford Track or Routeburn means you need a bag that handles moisture — both from the environment and from your own body heat. Backcountry and off-track travel demands something more robust still. One Planet bags address these challenges in several ways. Their hydrophobic down treatments ensure fill retains loft even when exposed to condensation and humidity. Shell fabrics like Pertex Endurance and Pertex Quantum Pro manage moisture effectively. And across the range, thoughtful construction details — from baffle design to zipper placement — reflect actual field use rather than theoretical engineering. Whether you are doing a Great Walk with the family, a solo hut-to-hut trip in Fiordland, or a winter alpine objective in the Southern Alps, there is a One Planet bag designed for those conditions. Dwights is an authorised NZ stockist and we can help you match the right bag to your trip. One Planet Range Overview Nitrous — Ultralight Down The Nitrous is One Planet flagship ultralight sleeping bag and one of the lightest bags for its warmth rating available anywhere. The +2°C model comes in at just 475 grams — a remarkable weight for a bag that genuinely keeps you warm. The Nitrous features a near full-length zip that stops short of the footbox, 3D vertical V-baffles, and 800-850 loft hydrophobic down. It is the go-to choice for ultralight trampers and fastpackers who weigh every gram but refuse to compromise on warmth. Available in +2°C, -1°C, and -3°C ratings, the Nitrous suits three-season NZ tramping across most of the country. Sonder — L-Shaped Zip, Opens Fully Flat The Sonder is One Planet most versatile everyday tramping bag. Its defining feature is an L-shaped zip that runs through the footbox, allowing the bag to open completely flat — it converts to a full quilt or blanket in a warm hut and zips back up fully for cold nights. This makes it uniquely suited to NZ hut camping, where temperatures inside can be perfectly comfortable early in the evening and drop overnight. The Sonder has a spacious tapered rectangular cut with a relaxed fit, making it a popular choice for people who find mummy bags restrictive. Available in -3°C, -5°C, -8°C, and -10°C ratings to cover NZ conditions from summer Great Walks through to cold autumn and winter trips. Cocoon — Near Full-Length Zip with Pertex Footbox The Cocoon offers one of the best warmth-to-weight ratios in the One Planet range. It uses 10-denier Vapour Vent fabric for both inner and outer shell — an exceptionally lightweight material that breathes well and saves grams wherever possible. The near full-length zip runs along the side and stops short of the footbox, while a Pertex footbox keeps feet warm and dry. The body-hugging mummy shape maximises thermal efficiency, and the hydrophobic down fill resists moisture absorption. The Cocoon suits lightweight trampers who want a mummy bag with good ventilation and a proven footbox. Available in -5°C, -8°C, and -11°C ratings. Rumour — Seam-Sealed for NZ Wet Conditions The Rumour is One Planet most weatherproof sleeping bag and a standout choice for NZ conditions. It is built with welded seam technology and a Waterproof, Breathable, Windproof Pertex Quantum Pro shell — the same technology used in high-end rain jackets. Every seam is sealed, meaning moisture simply cannot penetrate the bag from outside. This makes the Rumour ideal for exposed tarp camping, wet bivouacs, or any situation where your shelter might not be entirely bombproof. In New Zealand, where conditions can deteriorate rapidly and a wet bag is a genuine safety risk, the Rumour seam-sealed construction is its defining advantage. Available in -6°C, -9°C, and -12°C ratings for serious alpine and expedition use. Bungle — Expedition Down with Pertex Footbox The Bungle is One Planet all-round expedition sleeping bag, offering exceptional warmth and a feature-rich build for cold-weather adventures. It uses 800-850 loft hydrophobic down and a waterproof, windproof, breathable Pertex Storm footbox — One Planet Storm foot technology gives a warmer, drier footbox that outperforms standard construction in cold and wet conditions. Breathable 15-denier Vapour Vent fabric makes up the body of the bag, allowing water vapour to escape and the down to maintain full loft. The Bungle is the bag of choice for winter hut trips, Southern Alps alpine routes, and expedition travel in the South Island. Available in -4°C, -12°C, -15°C, and -17°C ratings. Bush Lite — Full Pertex Outer, Expedition Warmth The Bush Lite is a One Planet classic and the choice for trampers who want maximum weather protection combined with genuine warmth. The entire shell — not just the footbox — is made from Pertex Endurance, giving all-over resistance to damp and wind. Combined with 800-850 loft hydrophobic down and a vertical baffle system that prevents cold spots, the Bush Lite delivers consistent warmth in NZ most demanding conditions. The tapered rectangular cut gives more room than a mummy bag, and the relaxed fit is popular for longer trips where comfort matters as much as performance. Available in -11°C, -15°C, and -19°C ratings for serious four-season and expedition use. Summit — Synthetic Fill Option The Summit Synthetic series uses synthetic insulation rather than down, making it the most practical choice when keeping gear simple is the priority. Synthetic fill maintains warmth even when damp, is easy to wash, and requires less care than down. The Summit suits entry-level trampers, outdoor education groups, school camps, and anyone who prefers a low-maintenance bag. The affordable price point and compact pack size make it a solid starter bag for NZ conditions. Available in -5°C and -10°C ratings. Temperature Selection Guide for NZ Conditions Choosing the right temperature rating for NZ tramping requires a different approach than following standard ISO ratings alone. NZ conditions — particularly in the South Island, Fiordland, and the Southern Alps — are typically colder and wetter than ISO test conditions assume. Here is a practical guide: Great Walks, summer (Dec–Feb): A -3°C to -5°C bag suits most conditions. The Sonder -3°C or Nitrous +2°C work well for warm sleepers; the Sonder -5°C or Cocoon -5°C for average sleepers. Great Walks, shoulder season (Mar–Apr / Oct–Nov): Temperatures in huts drop significantly. A -5°C to -8°C bag is more appropriate. The Sonder -8°C or Cocoon -8°C are popular choices. Backcountry hut trips, year-round: A -8°C to -11°C bag covers most situations. The Cocoon -11°C or Bungle -12°C handle NZ backcountry conditions well. Winter tramping and alpine: -12°C and colder. The Bungle -15°C or -17°C, Bush Lite -15°C, or Rumour -12°C for wet alpine conditions. Wet conditions and tarp camping: Consider the Rumour regardless of temperature rating — the seam-sealed shell is the primary reason to choose it for exposed NZ conditions. As a general rule, size up rather than down for NZ. Cold sleepers should add 3–5°C buffer to ISO ratings when selecting for New Zealand conditions. Zipper Guide — Sonder vs Nitrous and Cocoon Understanding the zipper configuration on One Planet bags helps you choose the right one for how you actually sleep. Sonder — L-shaped zip through footbox: The Sonder zipper runs the full length of the bag and continues through the footbox in an L-shape. This means the bag opens completely flat — you can fold it back entirely and use it as a blanket or quilt. It is the most versatile configuration for hut use, where you might want an open blanket in a warm hut but a fully sealed bag for cold nights. This is a genuine differentiator and unique to the Sonder in the One Planet range. Nitrous and Cocoon — near full-length zip, stops short of footbox: Both the Nitrous and Cocoon feature a long side zip that runs most of the length of the bag but stops short of the footbox. This still gives excellent ventilation options — you can open the zip to your waist or fully unzip the top half — but the footbox remains sealed. For most trampers this is not a limitation, and it means the footbox construction can be optimised for warmth rather than zip access. If opening the bag flat is important to you — particularly for hut camping and Great Walks — the Sonder is the clear choice. If you prefer a body-conforming mummy shape with maximum weight savings, the Nitrous or Cocoon are the better fit. Ready to Find Your One Planet Bag? One Planet sleeping bags are our top recommendation for NZ trampers, and we carry the full range at Dwights. Whether you are heading out on a first Great Walk or planning a winter alpine objective in the Southern Alps, there is a One Planet bag designed for your conditions. Browse the full One Planet range at Dwights and find the right bag for your next NZ adventure. If you need help choosing, our team is happy to assist — we know these bags well and use them ourselves. You might also find our guide at One Planet Sleeping Bags NZ helpful for more detail on specific models. Ready to shop? View all One Planet sleeping bags at Dwights NZ.