This is commonly referred to as a "Jeep" Sweater. Army-brown color, 5-button this is what you wish your Aunt would get you for the Holidays, but, alas doesn't. These last forever (authentic Military clothes are known for that) look sharp, and yes, of course it's Warm. Some sweaters are 100% wool but we have discovered another batch of US made Military issue in 100% acrylic. 

Conditions;

Very Used = Repairs required for small holes, rips or tears

Used Good = Worn, may have some stains, stretching or be slightly miss shaped

Used Excellent = Near New condition, Either gently or never been worn