Fischer’s updated and upgraded Vacuum customizable fitting process is an essential part of why you’ll love the new RC4 The Curve 130; the system uses a 360-degree, three-dimensional mapping technique to form the liner and shell perfectly to your foot. As techy as that sounds, the process is made easy thanks to the guys n’ gals at your local ski shop, and the result is outstanding comfort and fit, and thereby longer, better days on the hill. Another noteworthy aspect of this boot is its use of Aramid in the lower shell to boost your performance. Aramid boasts a high strength-to-weight ratio and keeps its integrity regardless of temperature—ensuring a consistent flex no matter if it’s bitter cold or sweltering on the hill.