Next, you should always check the weight requirements; you should double-check the airline requirements. However, my rule is to be less than 10 lbs; you are good.
To meet my weight requirements, I pack interchangeable clothes. I wear a jacket and don't pack it. I don't pack any body products and make sure the destination has a Walmart or somewhere I can shop for them. Or if I am not staying at a hotel, I double-check if I can get it stocked or ship it over before my flight for it to be stocked. I will wear the shoes I will wear and only pack one extra pair of shoes. I put my undergarments in a pouch so they won't be thrown everywhere if I am "randomly" searched. If I need to bring my laptop, I take out the other pair of shoes.
So if you see someone with just a bookbag and a purse, road warrior, I see you. It is the best way to get in and out of TSA while meeting most airline requirements.