21st November 2019

sierratradingpost
16

Is polyester fill as warm as down?

Synthetic insulation is essentially polyester threading that is molded into long, single threads or short staples to mimic down clusters. Thinner and lighter threads fill voids and trap warm air more effectively. Unlike down, synthetic insulation is water-resistant and will still provide some warmth if it gets wet.

Is down warm when wet?

So now we know down is warm but doesn't do well in wet or humid conditions. Enter synthetic insulation. Synthetic insulation is designed to replicate the qualities of down, but retain them even when wet. These ultrafine fibers trap warmth in air pockets, providing great warmth… though not quite as good as down.
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