Introducing the lightest/best fitting high-performance ski sock on the planet. The FITS ® Film is as thin as film while still providing the benefits of a super-fine Merino wool sock. The new Film is 40% lighter than our Ultra Light Ski sock, but nothing has been compromised in the way of fit. This sock features zero cushioning, so you’ll want to pair the Film with a tight-fitting boot, as it offers zero interference between your foot and your boot. Engineered using FITS’s Full Contact Fit ® . Closest foot-to-boot interface which provides the best feel and control directly from your foot to the ski. Dynamic Toe Cup ® contours to the shape of your foot. Heel Lock ® provides heel security that limits the chances of a blister when combined with a properly fit boot. Over-the-calf length falls just below the knee.