You might choose down as a natural alternative, but welfare concerns and the fact that it can’t get wet rule it out for many, so where do you turn? Apparel company Paka hopes it will be towards Pakafill, a new insulation made from alpaca fibre. It’s early days for this patent-pending insulation, but the fact that it passed a field test at 17,913 feet altitude in the Andes Mountains is certainly a convincing debut. Outdoor brands should form an orderly queue.
Alpaca fibre is three times lighter than sheep's wool
There are 3.6 million alpacas in Peru
Alpaca fibre has a water retention rate of 8% compared to 16-20% for most other wool
The Pakafill Lightweight Puffer retails at USD 330, suggesting that Pakafill is not a cheap material. It is best used for investment pieces designed for longevity, which may not pose a problem for customers of outdoor brands who are used to paying more for quality. Mass market brands, however, are unlikely to invest in this material, but there are other solutions that don't involve plastic, including the Nudown's innovative use of air pockets for insulation.
Given how lightweight Pakafill is, consumers may not consider it suitable for sub-zero temperatures based on appearance alone. Paka overcame this with its field test and accompanying marketing, and while you may not wish to scale a mountain, communicating its capacity for multiple weather types will be crucial for uptake.
A natural insulation inside a plastic shell could undermine progress away from synthetics. Can you explore plastic-free outdoor materials such as Bananatex for your shell?