A 3-in-1 jacket is an outer shell plus a detachable inner jacket. You can wear the shell alone, the inner layer alone, or both together, giving three ways to wear it.

It is a jacket insulated with 3M Thinsulate™, a synthetic microfibre insulation that traps body heat efficiently. It gives strong warmth with less bulk than conventional padding.

Thinsulate™ offers excellent warmth for its thickness and keeps insulating when damp. Down is warmer for its weight in dry conditions. For everyday city and travel use, Thinsulate™ is a practical, low-maintenance choice.

It's comfortable for typical city winters and cold-weather travel. For very low temperatures or long exposure, layer a warm top or fleece underneath.

Yes. You can add or remove the inner layer as you climb and as temperatures change, which is ideal for treks where conditions vary through the day.

The 2-Piece Jacket has a water-repellent, windproof shell and a micro-fleece liner, suited to cool and cold weather. The Down Hardshell has a waterproof GORE-TEX shell, heat-taped seams and a down inner layer, built for snow and extreme cold.

Both jackets are warm; the 3-in-1 Protective 2-Piece Jacket offers the most flexible warmth because you can wear the shell and fleece liner together in colder conditions. The Thinsulate™ jacket is the best everyday option for city winters.

The 3M Thinsulate™ Tech-Padded Jacket is ideal for winter travel because it gives high warmth with low bulk, so it's easy to wear on flights and carry while sightseeing.

They are Grade 4 water-repellent, which means rain and snow bead up and roll off the surface. They handle light rain and snow well but are not designed for prolonged heavy downpours.

Yes. The Thinsulate™ jacket and the 3-in-1 2-Piece Jacket both feature windproof shells designed to block cold wind and reduce wind chill, and the Down Hardshell's GORE-TEX outer also blocks wind.

For winter or high-altitude treks, choose the 3-in-1 Protective Down Hardshell for its waterproof shell and down insulation. For shoulder-season treks with changing temperatures, the 3-in-1 2-Piece Jacket is a versatile choice because you can remove the fleece liner as you warm up.

Yes. The Down Hardshell is built for snow and freezing temperatures, and the 3-in-1 2-Piece Jacket works well for cold-weather sightseeing and snow holidays when layered over a warm base layer.