A system for expressing two materials onto a selected site is disclosed. According to the present invention, a transceiver operating according to another transmission scheme may transmit a frame in the IEEE 802. The material layer is covered by a patterned photoresist. In another feature of this application, a method of forming a barrier includes providing a composite material, and applying a relatively flexible material on a surface of the composite material, and concurrently molding the relatively flexible material with the composite material using a composite mold. The luggage cover is padded to prevent scuffs and scratches from forming on the luggage container and absorb impact in order to protect the contents therein. A polyurethane adhesive, such as a polyurethane reactive hot-melt adhesive, is made using the polyester polyol, which exhibits improved initial bonding strength, shortened setting time, and ability to bond to low surface energy substrates such as ABS.