I love the ScotteVest Travel vests and wear them all the time.  I decided to try the Featherweight Vest.  I would normally order a Medium in women's shirts but knowing how ScotteVests are designed, I ordered a large which fits nicely with enough space to carry stuff.  The only drawback to this particular order is that the vest was defective in that there was an unraveling hole at the bottom of the left front pocket.  Considered fixing it myself but the nylon type material inside the vest made me think twice, i.e. don't think I can stop the unraveling of nylon.  I'm returning the defective vest with a full refund and immediately buying a replacement light blue one (goes great with jeans!) as well as the Cement color one.  I think these lighter style vests will work out great for dog walks in the summer.