The Speedo Fastskin LZR Pure Intent Backstroke Edition High Waisted Jammer is designed with compressive dual layers and an ergonomic seam construction – working together to connect key muscle groups for a greater power return. Textured fabric zones aid drag reduction, while the triple fabric construction, with bonded seams, allows for greater freedom of movement. The Speedo Fastskin LZR Pure Intent Backstroke Edition High Waisted Jammer also features a regular style waist which allows for greater flexibility – ideal for breast stroke and IM swimmers. Fully FINA approved.