Feel unstoppable wearing Speedo's latest innovation developed by swimmers for swimmers. The Fastskin LZR Pure Intent 'Sonic Stealth' Closedback Kneeskin features compressive dual layers and ergonomic seam construction designed to connect key muscle groups for greater power return. Textured fabric zones target drag reduction so you get the very best from your swim, and the triple fabric construction with bonded seams has been designed to enable greater movement. The closed back offers greater coverage which can improve performance and may be preferred by swimmers with straight backs. This product has been fully approved by FINA.