Vintage U.S. Army Wool "Jack" Field ShirtThis shirt is 85% wool and 15% nylon 11. 5 oz material. Six button closure front, button closure on wrists as well. It is warm and perfect as another layer with its full roomy cut. It has two chest flap pockets that measure 8x6. It is great for hunting, outdoor work, bushcraft, winter camping, and on Wool has the widest comfort range in temperature of any material, retains warmth even when wet, and is not fragile around open wood fires as synthetics