The Fischer Twin Skin Power Med EF IFP / Tour Step-In IFP adult waxless cross-country skis are intended for any level skier. The Twin Skin strips are arranged in slightly offset positions resulting in consistent and efficient grip for harmonious gliding. Those cross-country skis are designed to work well in a range of snow conditions and excel in hard and glazed tracks. Which size of skis to choose? A special feature of classic cross-country skis is the climbing zone. To move forward, you need good grip, especially when ascending and your body weight is crucial for pressing the skis in the snow. A simple formula for length calculation would be to add 20 cm to 30 cm to your body height. Then, you can fine-tune your choice based on your technical skills. If you prefer, you can look for your relevant ski length in the Recommendation Chart. In-store sales assistants can help you to make the right choice. You are stuck between 2 ski sizes? You should know that the longer length applies to the more experienced skiers, while the shorter length is better for a less experienced skier.