With each passing season comes a new trend, a new silhouette, a new way to wear a classic. Case in point: in the past few years we've seen the boot evolve from the bootie to over-the-knee and back again, and now, everything goes. Obviously keeping up isn't easy, or always affordable, but Messeca Seena Boot ($199) offers a Fab solution: one supple leather mid-heeled boot with two zip-away inserts, creating three adjustable boot heights. Go from bootie to calf boot to knee-high boot with just a zip-zip. You can always chop your boot  to change up your look, but if you're not out for permanent change, this offers the versatility without commitment. No additional spending required.