These are military pants from the US Army. Since it says "field," I believe they are Army issue. They are from 1976 and are likely made in the USA. They are straight-leg slacks. They have adjusters on both sides, allowing for waist size adjustments. I purchased them at Koenji, a famous vintage clothing store. I'm selling them for a little less than I bought them for. The material is wool, so they should be useful in spring, autumn, and winter. They are easy to mix and match for casual occasions. They say "m-1951," so I think they are m-51 slacks (I'm not an expert, so I apologize if I'm mistaken). Regarding the size, I usually wear a size M, but these are larger, so I've listed them as size L. Please feel free to ask if you have any questions. ● Condition: I've worn them several times, but there are no noticeable stains or frays. Please understand that these are vintage and used items before purchasing. ● Other Notes: They have been stored in my apartment. Please check the photos for details. #Slacks #Military #MilitaryPants #60s〜 #60s #70s〜 #70s #80s〜 #80s #90s〜 #90s #AmericasCasual #Vintage #vintage #Vintage #CleanStyle #Fade #AmericasCasual #USArmy #AmericanCasual #Army #field #m-51 #m51