Ultimate stretch without compromising warmth for those who love the feeling of unparalleled mobility. The Seek Amp 5/4 Front Zip features our new Max_Flex outer lining throughout the shoulder area and arms. Freedom of movement is key in this crucial area, whether you're paddling for waves or holding on to your kite or sail. The secret to optimal heat retention lies in ION's super flexible Hot_Stuff 2.0 thermal lining throughout the torso and legs. Combined with nice and warm Plasma_Plush 2.0 on the back against wind chill and cold water will not ruin your session. In addition, light and stretchy limestone neoprene insulates and provides flexibility thanks to its super foam-like structure.