The newly designed RC4 The CURV GT 120 is an extremely light, high performance VACUUM fit boot with a secure, narrow fit. The forward lean can be adjusted for different levels of aggressiveness. The pre-shaped thermoformable 3D liner offers an exceptionally secure ankle fit. Small, individual fit pads can be attached to the liner to cover specific spots or provide better contact between the boot and foot. GripWalk adds security, comfort and convenience.