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INSULATION TYPES
Down
Down is the soft filling feather found in the undercoat of birds –usually duck or geese. It’s measured in fill power (how much it can loft); the higher the number, the better the warmth-to-weight ratio. Gram for gram, nothing insulates as effectively as down, but without a hydrophobic treatment it is susceptible to moisture – at which point its ability to keep you warm will drop.
• Pros: Lightweight, warm, and compressible
• Cons: Sensitive to moisture, more expensive
Synthetic
Synthetic insulation is a light and durable material (usually polyester) that retains much of its insulating properties when wet. Modern versions offer impressive warmth ratings, resulting in reliable performance at a lower price.
• Pros: Good water resistance, easier to care for, cheaper
• Cons: Heavier and bulkier than down
DOWN VS SYNTHETIC – WHICH SHOULD I CHOOSE?
Down-filled bags are ideal for expeditions and long-distance backpacking trips where space and weight are critical. Synthetic bags are great for damp conditions like the UK. They also suit the price conscious, and are the top choice if you’re camping with kids!
Down
Synthetic
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