These are used US Military second generation load bearing vests. They have four angled magazine pouches to hold 6 magazines total, 2 grenade/bandage/utility pouches, and a breathable mesh backing. These are used in great condition.
People has asked about the size. These have a lace up side made from parachute cord, so you can tighten it down really small, or let it out really big and even add more para cord to make it bigger if you want, I have fit customers who wear a 4x BDU top in them by adding more para cord.