Spire doesn't fit everyone. It fit me really well. Loved the weight, fit, comfort. Wanted/needed more armor without another layer. Was wearing a TEK with a avy bag. Charger just did not work for me, fit-wise. I do have a BCA mountain float vest 2.0 now. BCA M/L, fit is perfect for me. 5-8 175lbs, 42S, 34 waist, 36 belt size. JMPE.