They say it helps reduce the friction between the base and snow. These dimples are elongated, not circular like a golf ball, and arranged lengthwise. Think along the lines of a skinny football shape.
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
16 Burton Genesis X . 15 Now Drive
16 Flow Talon . 14 Flow Hylite