If there’s room under your rain shell for this much insulation

To ensure that water stays on the outside

A relaxed garment for every walk of life

When our customers asked for a version for warmer conditions

The interior insulation is lightweight and quick-drying

filson man field jac shirt fmosh0015w0097 391 HERITAGE30 If there’s room under yourThis versatile overshirt provides an added layer of protection on cool days in the field. Patterned after our original iconic Jac Shirt thats been a favorite since the 1970s, its versatility makes a sure go to favorite. The strong midweight fabric is a reverse sateen weave, smooth on the inside for easy layering. Sturdy buttons secure the front, chest pocket flaps, and adjustable cuffs. Straight hem for untucked wear. Spread collar.