How much rocker do I need in a powder ski?

At minimum, you want significant tip rocker for flotation and to prevent tip-dive. Most powder skis also have tail rocker for easier turn release and a looser feel. The amount of rocker affects how the ski performs: more rocker means more flotation and easier pivot but less edge hold and stability on firm snow. For a dedicated powder ski, tip-and-tail rocker with camber underfoot is the most versatile profile. Full rocker is for the most specialized deep-snow applications.