Is the Jackaloft worn under or over armor?

We designed the Jackaloft specifically for layering under an outer jacket and/or under armor on the bike, but it works just as well around camp or in town.

The Primaloft Gold with cross-core technology (aka aerogel) retains better insulation values when compared to other synthetic and down insulation products that depend on their loft alone.

When in cooler temperatures, it is best worn under armor, as Primaloft still warms/insulates when compressed under armor vs. down that loses insulation performance when compressed.