Rossignol S7 Skis 2011: The Rossignol S7 Skis feature Rossignol s unique AmpTek ski design concept that combines traditional and reverse camber to deliver more versatility, rebound, boost and ease-of-use than conventional skis. The Rossignol S7 Skis are perfect for backcountry powder but hold their own on-piste and power through the crud. A wood core provides the ultimate response, feel, powder and durability. The Rossignol S7 Skis also feature Rossignol s WRS (Weight Reduction System) that features patented fiberglass fibers concentrated under food with less density in the tip and tail to maximize the skis’ durability and minimize overall weight.