With aviator styles—or any pair that has wire nosepieces, for that matter—your hair can get caught, which yanks your strands (ouch) and could even bend or break the bridge of the sunglasses. Depending on the shape of your head, it can stretch out the earpieces of your sunglasses, making them too loose. They’re bound to slip off when you bend over or look down, eventually resulting in a broken or scratched pair.

Many sunglasses stores (like Sunglass Hut) offer complimentary in-store adjustments—tiny tweaks to make sure your shades sit properly on your face. And did we mention that it’s free? If your mini crossbody is too teeny for a hard-shell glasses case, do the bare minimum and wrap your sunnies in the microfiber cleaning cloth (that they also came with) before tucking them away.