Abstract: A window system including a plurality of side assemblies, each side assembly having first and second flexible material frame members that are coupled together along a seam. First and second magnetic material strips are coupled to an interior wall of the first and second flexible material frame members, respectively, so that the first and second magnetic strips attract each other. A plurality of corner closure assemblies are adapted for joining a first adjacent side assembly and a second adjacent side assembly of the plurality of side assemblies and each corner closure assembly has first and second flexible material corner members that are coupled together along a seam. First and second magnetic material pieces are coupled to an interior wall of the first flexible material corner member and to an opposite interior wall of the second flexible material corner member, so that the first and second magnet pieces attract each other.