I'm a fan of Blanc menswear and I've bought many items but the vest straps on these keep sliding off your shoulders even when standing. It's a fairly tight fit (you can only pick your size according to waist), so size isn't the issue for me - it's worse if you bend over, slides right off. The material is a bit thick as well, uncomfortable to wear all day. :-) . You could cross the straps, that works, but the material bunches up front and back. As is with life, not everything works for everyone.