Airy yet warm, these layers are killin' it in the nonchalant style department. These styles are perfect for the in-between weather we all know is coming for us. Forget spring bomber of last year this Fall, satin trenches are really 'warming' up to us. If that's not how you roll, try the ultra-cool oversize denim jacket or a mannish blazer over summer-ey things and enjoy the attention. Get your must-have update on lightweight jackets and throw them on for the perfect temperature.