Hard to find Jac Shirt as these were a limited run let alone brand new with tags.

The Filson Oiled Shelter Cloth Jac-Shirt is a rugged overshirt designed for field use, made from midweight oil-finish Shelter Cloth that balances durability, weather resistance, and comfort.

• Oil-finish Shelter Cloth exterior: Midweight cotton canvas treated with Filson’s signature oil finish, making it water- and wind-repellent while resisting abrasion from brush and rough terrain.

• Insulation: 100g PrimaLoft® Gold insulation provides warmth even when wet, keeping the garment lightweight and low-bulk.

• Functional pockets: Two snap-flap chest pockets and two streamlined side-seam handwarmer pockets for utility and comfort.

• Layered construction: Body lined with cotton canvas, sleeves lined with polyester twill for easy layering, and collar lined with Mackinaw Wool for added warmth.

• Snap closures: Front snap closure and snap-secure cuffs allow quick adjustments, even with gloves