Lulus single shoulder, cut out maxi dress with a front slit

This pretty maxi dress is a polyester net fabric. One shoulder styling at the front has cut outs. There is a high front slit for Alex show. Dress is new with tags. However, there’s a little dust marks at the bottom from being in the store. It will easily wash out if this is a washable fabric but I can’t do it because then it wouldn’t be new with tags. It’s 59 inches shoulder to ham and poly fabric is stretchy