Poly wool, a blend of polyester and wool fibers, can provide warmth, but its level of warmth is generally less than that of pure wool. According to one source, polyester is not as breathable or warm as wool. This inherent difference in the thermal properties of the constituent fibers directly impacts the warmth of the resulting blend.
Understanding Poly Wool
Poly wool fabrics combine the characteristics of both polyester and wool.
- Polyester: A synthetic fiber known for its durability, wrinkle resistance, and often lower cost. However, as noted in the reference, it's not as breathable or warm as wool.
- Wool: A natural fiber prized for its excellent insulation, moisture-wicking properties, and ability to regulate temperature. The reference highlights that wool is temperature-regulating and soft.
Comparing Component Warmth
The warmth of poly wool is a result of blending these two materials.
| Feature | Wool | Polyester |
|---|---|---|
| Warmth | Very warm, excellent insulator | Not as warm as wool |
| Breathability | Breathable | Not as breathable as wool |
| Temperature Regulation | Excellent, adapts to body temp | Less effective |
| Durability | Good, but can be delicate | Very durable, wrinkle-resistant |
| Care | Often requires special care | Easy care |
Based on the comparison, polyester contributes durability and ease of care to the blend, while wool provides the primary source of insulation and warmth.
Factors Influencing Poly Wool Warmth
The actual warmth of a specific poly wool fabric depends heavily on the percentage of wool in the blend.
- Higher Wool Content: A blend with a higher percentage of wool will be warmer and exhibit more temperature-regulating properties.
- Higher Polyester Content: A blend with more polyester will be less warm but potentially more durable, wrinkle-resistant, and easier to care for.
Therefore, while poly wool does offer warmth due to the presence of wool fibers, it is typically not as warm as a fabric made of 100% wool, especially if the polyester content is significant.
In conclusion, poly wool provides a balance between the warmth of wool and the practical benefits of polyester. Its warmth level is relative and depends on the specific blend ratio, but its polyester component makes it not as warm as pure wool, as indicated by the reference.
