Second Generation Swimskins By Liz HichensPublished Oct 7, 2010 comments Tweet Share << Back to StoryOpen full size in new window. The PZ3TX uses a different material on the upper back. Liz HichensLiz Hichens is the Web Producer of Triathlete.com. She is an Ironman and marathon finisher and fan of all endurance sports.Follow @lizhichensAll articles by Liz