This skirt is our custom made skirt to fit perfectly to your NuCamp RV trailer. We are offering this, skirt only option, for a few reasons. Some people like to slide on a skirt to keep the wind from blowing out from under their trailer. It also helps keep the trailer warmer underneath. Some people also use this skirt with other model tents that do not allow you to use your step with their skirt design. So if you have a tent that does not have a skirt that you like, you can replace the skirt with this option. This skirt has Velcro along the side edges to help you blend the two together. However this skirt is not custom to any other tent then the Allpro Side Tent. Also the skirt is designed to lay under the floor of the tent so if you are using the skirt alone you will need to lay it under your rug or add something as weights to keep it from blowing up.