According to the information I have learned, the product line of Filias corpus includes the first generation, the second generation and the third generation. Among them, the first generation refers to the first generation product line of Phileas Corleone, which usually adopts traditional shoemaking techniques and materials. The second generation refers to the improved product line launched by Filaria, which may be improved in comfort, portability and shock absorption effect. The third generation is the third generation product line of filariasis, which is likely to have further innovation and promotion in material selection, technical application and design style.
Please note, however, that the specific differences between different product series also need to refer to the official release information or product description of Filaria. Because the design and technical update speed of different product lines may be different, in order to get a more accurate answer, it is recommended that you refer to the official product description of Filaria or consult relevant professionals.