We analytically derive the propagating wavefront form of Swallowtail-Gauss beams (SGBs). and we demonstrate the propagation characteristics of SGBs experimentally and numerically. During propagation. one type of SGBs gradually evolves into a deformed SGBs. https://www.nacrack.com/hot-choice-Open-Box-Verona-Wig-by-BelleTress-Heat-Friendly-Synthetic-Hair-Average-Cap-Buttered-Toast-R-great-buy/