INSULATION
Synthetic insulation is durable and will keep the user warm even when it's wet. It is cheaper, bulkier and heavier than down, but modern synthetic fills are coming close to equaling down in weight and compressibility. Down offers incredible warmth to weight and will most likely be treated with a hydrophobic coating that will resist soaking and dry more quickly. This means that in wet conditions, down won't ‘clump’ so easily whilst still offering warmth.
HOODS
Hoods improve warmth considerably by trapping warm air around your head without blocking visibility. Hoods on alpine or climbing jackets will fit over or under the helmet. Drawcords are often used to tighten the
