The SIS Soft Is Strong set is a comprehensive collection that includes a photobook, lenticular card, 2 photocards, an envelope with cards, a folded poster, a lyric card, and a sticker. This package is perfect for fans looking to immerse themselves in the world of SIS, with each item adding a unique touch to the overall experience. The inclusion of a folded poster and lyric card enhances the visual and lyrical elements of the set, making it a must-have for any dedicated fan.