Brushtail Possum Beanie vs Octa Fleece Hat: Which Is Warmer?
By Zpacks | Level Up Your Next Adventure | Published: 2026-11-01
Category: Comparisons
We compare the Brushtail Possum Beanie and the Zpacks Octa Fleece Hat on warmth, weight, and packability so you can pick the right ultralight hat for cold camps and winter hikes.
Quick answer
For the warmest ultralight beanie in still, sub-zero conditions, choose the Brushtail Possum Beanie. If you run hot, want maximum breathability, or need a hat that disappears into a pocket, the Zpacks Octa Fleece Hat is the better pick.
Warmth: possum fur delivers more heat per ounce
The Brushtail Possum Beanie combines New Zealand brushtail possum fur with Merino lamb's wool. That blend is the reason one reviewer reported staying toasty in sub-zero temperatures. The Octa Fleece Hat uses a double layer of fleece around the ears to lock in heat where it matters most, but it does not have the same insulating fur content. In still air, the possum beanie is the warmer of the two.
Breathability and damp conditions: fleece pulls ahead
The Octa Fleece Hat is described as breathable and easy to pack. That makes it a better match for high-output activities or milder cold where you might sweat. The possum beanie is built for warmth first, so it can feel too warm during hard climbs. If you alternate between moving fast and standing still, the fleece hat gives you more margin before overheating.
Weight and packability: both are ultralight, but fleece is simpler
Both hats are designed to be ultralight. The Octa Fleece Hat is specifically noted as easy to pack, and its double-layer ear band adds warmth without bulk. The possum beanie has no stated weight or packed size in the catalog, so if precise grams matter, treat that as an unknown. In practice, either hat will disappear into a hipbelt pocket, but the fleece hat is the more forgiving option if you need to stuff it away wet.
Trade-offs to weigh
- Warmth vs breathability: The possum beanie wins on raw warmth in still air, but the fleece hat breathes better when you are moving hard. Pick the possum beanie for sitting around camp in sub-zero; pick the fleece hat for sweaty climbs in cold weather. If you only buy one hat for winter camping, choose the possum beanie; if you run hot, choose the fleece hat.
- Ear coverage: The Octa Fleece Hat has a double layer of fleece around the ears. The possum beanie does not list a specific ear-band construction, so if ear warmth is your priority, the fleece hat has the clearer design feature. Check whether you need targeted ear warmth or overall insulation.
- Packability and care: The fleece hat is explicitly easy to pack and can be stuffed without worry. The possum beanie's fur and wool blend may need more careful handling, though the catalog does not specify care instructions. Treat the possum beanie as a dedicated camp hat rather than a stuff-and-go item. If you want a hat you can crush into a pocket, the fleece hat is the simpler choice.
Product facts
- Brushtail Possum Beanie: Made from New Zealand brushtail possum fur and Merino lamb's wool; a reviewer reported staying warm in sub-zero conditions. This blend is why the beanie is the warmer choice for cold camps and still-air insulation.
Brushtail Possum Beanie - Zpacks Octa Fleece Hat: Features a double layer of fleece around the ears and is described as breathable and easy to pack. That design locks in heat at the ears while letting you dump heat during active use, and it packs away without fuss.
Zpacks Octa Fleece Hat
Which should you choose?
Best for
- Cold sleepers and winter campers who want the warmest ultralight beanie for still, sub-zero nights
- Hikers who prioritize warmth over breathability and do not mind a dedicated camp hat
Not for
- High-output activities where you sweat heavily and need maximum breathability
- People who want a hat they can stuff carelessly into a pack without a second thought
