One of the original SITKA designs, the Jetstream Jacket was built for active mountain pursuits in cold weather.

One of the original SITKA designs, the Jetstream Jacket was built for active mountain pursuits in cold weather.

One of the original SITKA designs, the Jetstream Jacket was built for active mountain pursuits in cold weather.

One of the original SITKA designs, the Jetstream Jacket was built for active mountain pursuits in cold weather.

One of the original SITKA designs, the Jetstream Jacket was built for active mountain pursuits in cold weather.

One of the original SITKA designs, the Jetstream Jacket was built for active mountain pursuits in cold weather.

Minimal in weight and bulk but packs a punch for core warmth.

Minimal in weight and bulk but packs a punch for core warmth.

Minimal in weight and bulk but packs a punch for core warmth.

Minimal in weight and bulk but packs a punch for core warmth.

The windproof Jetstream Vest protects valuable core heat in cool temperatures and high winds.

The windproof Jetstream Vest protects valuable core heat in cool temperatures and high winds.

The windproof Jetstream Vest protects valuable core heat in cool temperatures and high winds.

The windproof Jetstream Vest protects valuable core heat in cool temperatures and high winds.

The windproof Jetstream Vest protects valuable core heat in cool temperatures and high winds.

The windproof Jetstream Vest protects valuable core heat in cool temperatures and high winds.