If you want a REAL safety harnass vest; get a Summit Seat-O-Pants vest. Comes with a linesmans belt built into it as well as the middle of the back safety belt. It stores your safety ropes with the Summit prussic knot in the back of your vest in a pocket and is made of high quality camo cloth instead of mesh. A linesmans belt is essential to me with my type of Lone Wolf climbing sticks, new setup each day. Yes, it can be worn under your clothes or coat. When I wanted a vest I compared them all and nothing could hold a candle to the Summit Vest.