PHILADELPHIA — Orthopedic supports manufacturer Bilt-Rite Orthopedics and Safety has acquired the Medical Products division of Mastex Industries, which makes hot and cold therapy packs, heating pads, wheelchair cushions, mattress overlays and other comfort pillow products. Mastex brands include Gel-eeze overlays and Thermalfreeze therapy packs. Bilt-Rite will move Mastex's manufacturing operations from Petersburg, Va., to a new facility just outside of Philadelphia. "The Mastex line not only provides Bilt-Rite with new complimentary products but it also provides us with the ability to develop new products that we can make right here domestically," said Will Palmer, Bilt-Rite operations manager.