The Amp level represents exceptional performance especially in terms of stretch. Besides, ION's brand-new and incredibly flexible inside lining Hotstuff 2.0 in combination with the toasty warm Plasma_Plush on the backside ensure an optimal level of heat retention and flex. Our Maki_Tape 2.0 for great flexibility supports the Ninja_Knee construction as well as the other seams. Plus, the Ninja_Spine allows greater freedom of movement for the upper body! We also added a frontzip to this design so nothing will interfere with your paddle power.