Inspired by our elite team of Nordic athletes and their incredible attention to detail, our GFX and IQ Fit constructions are tuned to deliver true innovation for every level of cross-country skiing. Immediate improvements in stability, control, foot and leg fatigue, boot feel, and optimized temperature regulation is the result. These are the easiest performance and comfort upgrades you will find this winter season. No more hotspots or blisters. We guarantee it.