One Planet Sleeping Bags NZ — The Complete Range Guide
One Planet is an Australian sleeping bag brand with a straightforward mission: build bags specifically for Southern Hemisphere conditions. That means extended shoulder seasons, high humidity, and weather that can shift dramatically within a single trip. While many sleeping bag brands design for European alpine conditions and then export to the rest of the world, One Planet engineers their bags from the ground up for the conditions trampers and climbers actually encounter in Australia and New Zealand.
Dwights NZ is a stocking dealer for the full One Planet range. This guide covers every bag in the current line-up, with weight figures, temperature ratings, and honest notes on who each bag suits. Browse the full sleeping bag range or see our sleeping bags NZ buying guide for help selecting the right bag for your trip.
The One Planet Range — Overview
One Planet produces bags across multiple series, each designed for a specific use case. Understanding the series — and the key differences between them — makes choosing straightforward.
Nitrous Series — Ultralight Tramping
The Nitrous is One Planet's ultralight performance series, designed for fast-and-light tramping and situations where pack weight is the primary constraint. Down fill, tight construction, minimal volume.
- Nitrous +2°C — 475g. Summer tramping and mild nights. The lightest bag in the range.
- Nitrous -1°C — 508g. Three-season ultralight option. Works well for NZ summer shoulder seasons.
- Nitrous -3°C — 572g. Extends the usable season into cooler conditions while staying under 600g.
Nitrous bags use a near full-length side zip that stops short of the footbox — they do not open fully flat. This is worth knowing if you're planning to use the bag as a quilt or share warmth with a partner bag.
Sonder Series — Versatile Three-Season
The Sonder is One Planet's standout feature bag. Its distinguishing characteristic is the L-shaped zipper that runs through the footbox, allowing the bag to open completely flat. This is exceptionally useful in huts, for ventilation management, and in variable temperatures where you want to sleep with the bag open as a blanket. The Sonder is a favourite for NZ hut tramping.
- Sonder -3°C (Pertex footbox) — 655g. Three-season performance in a versatile package.
- Sonder -5°C — 671g (regular) / 705g (long). Extends well into shoulder seasons and cooler NZ huts.
- Sonder -8°C — 717g. For colder hut conditions and early winter trips.
- Sonder -10°C — 852g. Cold-weather capability while retaining the flat-open functionality.
Cocoon Series — Standard Mummy Construction
The Cocoon uses a near full-length side zip — similar to the Nitrous — that stops short of the footbox and stops short of the footbox. This is a standard mummy bag construction that provides excellent heat retention for its weight. Available in regular and long lengths across the range.
- Cocoon -5°C (Pertex footbox for condensation protection) — 676g (regular) / 693g (long). Three-season performance with good warmth-to-weight.
- Cocoon -8°C — 733g (regular) / 742g (long). Suitable for cold hut nights and shoulder-season alpine camps.
- Cocoon -11°C — 867g (regular) / 898g (long). Four-season capability for demanding conditions.
Rumour Series — Wider Fit Down Bags
The Rumour addresses a common complaint: standard mummy bags feel too restrictive for comfort sleepers. Unlike most down sleeping bags, the Rumour series features seam-sealed construction — keeping water out at the seams and making it a standout choice for NZ\'s wet tramping conditions. The Rumour uses down fill in a wider-cut construction, giving more room to move without the heat-loss penalty of a semi-rectangular bag. Well-suited for NZ trampers who spend multiple nights in huts and value comfort.
- Rumour -6°C (seam-sealed — a key differentiator for NZ wet conditions) — 841g. Three-season comfort in a roomier cut.
- Rumour -9°C — 896g. Extends the range for cooler conditions while maintaining the wider fit.
- Rumour -12°C — 1,029g. Solid four-season performance for cold hut and camp conditions.
Bungle Series — Expedition and Alpine
The Bungle is One Planet's expedition-grade series. Built for sustained cold and multi-week expeditions where the bag needs to perform at low temperatures night after night. These are serious bags for serious conditions. Cold-weather performance at a reasonable weight for the rating.
Bush Lite Series — Heavy-Duty Expedition
The Bush Lite is built for extended use in demanding Southern Hemisphere conditions — remote NZ wilderness, extended alpine approaches, and multi-week expeditions where durability is as important as weight. These are robust, long-term bags.
- Bush Lite -11°C (full Pertex outer) — 1,045g (regular) / 1,081g (long). Four-season capability in durable construction.
- Bush Lite -15°C — 1,116g (regular) / 1,205g (long). Serious cold-weather performance.
- Bush Lite -19°C — 1,390g (regular) / 1,402g (long). Expedition-grade rating for the coldest NZ conditions.
Summit Series — Synthetic Fill
The Summit is One Planet's synthetic sleeping bag — designed for situations where down's vulnerability to moisture is a concern. Synthetic fill retains warmth even when wet, making these bags well-suited for high-rainfall NZ environments and hut conditions where dampness is a constant factor.
- Summit -5°C — 1,085g. Three-season synthetic performance.
- Summit -10°C — 1,415g. Four-season synthetic for colder conditions.
Quest Pro Quilt
The Quest Pro Quilt is a dedicated quilt-style sleeping system for ultralight trampers who sleep hot or prefer open sleeping. Quilts save weight by eliminating the underside insulation you compress anyway during sleep, and the Quest Pro is One Planet's precision-engineered answer to this category.
- Quest Pro Quilt -0°C — 517g. Ultralight quilt for mild to moderate conditions.
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Quest Pro Quilt -3°C — 562g. Extends the quilt system into cooler conditions. Designed to be carried as emergency insurance or as a secondary bag in a multi-bag system. Not a primary bag for extended trips, but a sensible addition to any serious kit list where unexpected conditions are a risk.
Temperature Selection Guide
One Planet rates their bags using ISO standard comfort ratings. A few key points for NZ conditions:
- NZ hut temperatures can drop to 0–5°C overnight on the main ranges in winter, even in huts
- For shoulder seasons (April–May, September–October), a -5°C to -8°C bag covers most NZ tracks
- For summer Great Walks and lower-altitude hut tramping, a -1°C to -3°C bag is generally sufficient
- For winter or alpine trips, -10°C to -15°C is the appropriate range depending on elevation
- Cold sleepers should add 3–5°C buffer to the stated temperature rating
Shape and Zipper Guide
One Planet bags come in two primary zipper configurations:
- L-shaped through-footbox zip (Sonder series): Opens completely flat. Ideal for hut use, ventilation control, and versatile sleeping. The most flexible option for NZ tramping.
- Near full-length side zip (Nitrous, Cocoon): Runs most of the bag's length but stops short of the footbox. Standard mummy construction with good heat retention. stops short of the footbox.
For most NZ tramping, especially hut-based trips on the Great Walks or main range tracks, the Sonder series' flat-open capability is a genuine quality-of-life advantage. For ultralight trips where every gram counts, the Nitrous or Cocoon construction gives better warmth-to-weight.
Conclusion
One Planet's range covers every legitimate NZ tramping and expedition scenario — from summer ultralight trips on the Tongariro Alpine Crossing to winter alpine approaches in the Southern Alps. The Sonder series is the sweet spot for most NZ trampers: versatile, well-built, and genuinely suited to hut conditions. The Nitrous suits fast-and-light trampers who know their conditions. The Bush Lite and Bungle are for serious expeditions where failure isn't an option.
Browse the full One Planet sleeping bag range at Dwights.
Frequently Asked Questions
Where are One Planet sleeping bags made?
One Planet is a Melbourne-made brand, designing and manufacturing bags in Melbourne specifically for Southern Hemisphere outdoor conditions — including New Zealand's variable weather, high humidity, and extended shoulder seasons.
What is the warmest One Planet sleeping bag?
The One Planet Rumour, Bungle, and Bush Lite are among the warmest in the range, suitable for winter tramping and cold South Island conditions.
Are One Planet sleeping bags good for NZ tramping?
Yes — One Planet bags are specifically designed for Southern Hemisphere conditions, making them well-suited to NZ tramping. The hydrophobic down handles humidity better than standard down, and the temperature ratings reflect realistic sleeping conditions rather than survival minimums.
What is the difference between the One Planet Sonder and Cocoon?
The Sonder uses an L-shaped zip that opens the bag fully flat — useful for venting and pairing with a partner bag. The Cocoon uses a near full-length side zip. Both use high-quality hydrophobic down. The Sonder's zip design is a standout feature for versatility.
Does One Planet use ethical down?
Yes. One Planet uses RDS (Responsible Down Standard) certified hydrophobic down across their sleeping bag range.
Where can I buy One Planet sleeping bags in NZ?
One Planet sleeping bags are available at Dwights, stocked across the full range from the lightweight Nitrous +2 through to the expedition-grade Cocoon -11°C. Browse the full range at /collections/sleeping-bags.