Quick Answer
Merino wool insulation does compress when wet, but its performance is significantly better than other types of insulation. When wet, merino wool loses about 20-30% of its insulating power, but it retains its breathability and moisture-wicking properties. It takes about 2-3 hours for merino wool to regain up to 80% of its insulating power after drying.
Water Absorption and Insulation Loss
Merino wool has a unique ability to absorb and release moisture quickly, which makes it an excellent choice for active hunters. When exposed to rain or snow, merino wool can absorb up to 30% of its weight in water. However, its insulating power starts to degrade after about 10-15 minutes of wet conditions. To minimize insulation loss, it’s essential to choose a merino wool product with a high density and a tight weave. Aim for a product with at least 19-20 microns in thickness to ensure optimal performance.
Drying Time and Regaining Insulation Power
The rate at which merino wool dries is crucial for regaining its insulating power. In dry air with moderate temperatures (around 50-60°F or 10-15°C), merino wool can dry in about 2-3 hours. However, in cold and humid environments, drying times can be significantly longer. To speed up the drying process, use a lightweight, compact towel to gently blot excess moisture, and consider applying a water-repellent treatment to the merino wool layer.
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