The Amp level represents ‘exceptional performance’ especially in terms of stretch. The Ninja_Knee construction is primarily supported by the famous Maki_Tape. We’ve enlarged the back panel which saves some weight and increases the area of plushy lining
Epic Flex: Single back panel, improved shoulder flap, Sweep Cut, Ninja_Knee and N-Foam.
Warm: Hot_Stuff lining, Seal_Tight and Maki_Tape 2.0
Maki_Tape 2.0: Improved neo tape seal for superb flex, water resistance and seam reinforcement