The Fastskin LZR Pure Intent Kneeskin features compressive dual layers and ergonomic seam construction designed to connect key muscle groups for greater power return. Available sizes: 20 GB (30 IT - 25 FRA), 22 GB (32 IT - 26 FRA), 23 GB (27 FRA), 24 GB (34 IT - 28 FRA), 25 GB (29 FRA), 26 GB (36 IT - 30 FRA),28 GB (38 IT - 32 FRA), 30 GB (40 IT - 34 FRA). Models: open back, closed back. Colors: Green/Blue, Purple/Black. Note: the price of the product in the red/black /silver color has a surcharge imposed by the manufacturer of € 20 both in the open back and in the closed version. 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 for to enable greater movement. The open back offers greater freedom of movement and may be preferred by swimmers with arched backs. This product has been fully approved by FINA. Speedo Fastskin LZR Pure Intent Kneeskin features precision straps for enhanced comfort; new flexible zones in the construction to aid in putting the suit on; compressive dual layers and ergonomic seam construction, designed to connect key muscle groups for greater power return; triple fabric construction with bonded seams allows for greater range of movement; new textured fabric zones targetting drag reduction for optimal performance; FINA approved