What's the difference between slalom and GS race boots?

Slalom (SL) boots tend to have slightly softer flex (130–140 vs. 140–150 for GS) and may have a slightly more upright stance to facilitate quick, short-turn edge transitions. GS and speed event boots prioritize maximum stiffness and aggressive forward lean for stability at higher speeds with longer turns. Some manufacturers make distinct SL and GS models, while others offer a single race platform with adjustable features that can be tuned for either discipline.