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.
15 LibTech TRS HP . 15 NS Snowtrooper . 15 NS Ripsaw . 13 Salomon Pow Snake
15 Now Drive . 14 Now Drive
14 Flow Hylite