Quick Answer
Synthetic insulation holds up better against moisture than wool due to its hydrophobic properties and ability to dry quickly. Synthetic insulation is less susceptible to the negative effects of wet conditions, such as reduced loft and weight gain. It also tends to retain its insulating properties when wet.
Synthetic Insulation’s Moisture Resistance
Synthetic insulation, such as Polarguard or Thinsulate, is designed to repel moisture and maintain its insulating properties even when wet. This is due to its hydrophobic (water-repelling) coating, which prevents water from penetrating the material. As a result, synthetic insulation tends to retain its loft and insulating properties, even in wet conditions.
Wool’s Moisture Sensitivity
In contrast, wool insulation, such as PrimaLoft or Polarguard’s wool-based alternatives, is more susceptible to moisture damage. When wool gets wet, it can lose up to 70% of its insulating properties, making it less effective in cold and wet conditions. Wool also tends to retain moisture, which can lead to weight gain and reduced loft.
Moisture-Resistant Techniques
To minimize moisture-related issues with wool insulation, users can employ various techniques, such as using a waterproof and breathable membrane, such as Gore-Tex or eVent, to keep moisture out. Additionally, users can use a drying agent, such as silica gel, to absorb moisture and help wool insulation dry faster. By employing these techniques, users can extend the lifespan of their wool insulation and maintain its insulating properties in wet conditions.
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