I used to work at a boutique, and spring-to-summer was always our sign of what shoppers couldn't get enough of. The second the weather warmed up, everyone skipped past anything fussy and went straight for breezy midis, easy maxis and throw-on dresses that looked put-together (no styling stress required!). I could easily predict which ones would sell out within days. From bold, vacation-ready maxis to easy shirt dresses you'll wear on repeat, I rounded up 17 dresses that give that same boutique bestseller energy - without the markup.