Twister-Lights body and lens are constructed with a unique material of unbelievable strength and chemical resistance. The body and lens are designed to sustain normal impacts and are water resistant. The body is made of Xenoy. The XENOY alloy is a blend of semi-crystalline polyester (typically polybutylene terephthalate, PBT, or polyethylene terephthalate, PET) and polycarbonate (PC). The XENOY resin family offers good chemical resistance, great impact resistance even at low temperatures, heat resistance, and outstanding aesthetic and flow characteristics. XENOY alloys offer outstanding performance in applications that are exposed to harsh conditions, or that require a high degree of toughness. The transparant cover is made of polycarbonat. Polycarbonate is a durable material. It has high impact-resistance. The characteristics of polycarbonate are quite like those of polymethyl methacrylate (PMMA, acrylic), but polycarbonate is stronger and usable over a greater temperature range. Polycarbonate is highly transparent to visible light, with better light transmission than many kinds of glass.