Very cheap British mechanic's coveralls! These are olive drab green and lightweight, meant for warmer weather or indoor work. British army surplus, in very good condition.
These coveralls are refreshingly simple. They consist of polycotton fabric and hook-and-loop tabs. The adjustments are where you would want them to be: in the leg and sleeve cuffs and the waist. There is a chest pocket for pens and such, and a larger pocket on the thigh. The sides have openings; you can reach for stuff in your pant pockets, for example. Please note that these only come in OD green, despite what the extra pictures show.
Even though these coveralls are lightweight and meant for warmer weather or indoor work, you could also put on some layers and not get all chilly outside.
British military surplus but in excellent shape. Some of them might even be unissued.
Tim T.