Sonia Rykiel's diffusion line Sonia by Sonia Rykiel is her youth-centric range, launched to critical acclaim in 1989. The French designer is celebrated for her pioneering inside-out stitching techniques and quirky silhouettes imbued with a Parisian-chic. Rykiel collections have been dazzling the fashion industry since the 60s and continue to offer up playful, slogan-splashed trademarks. Sweatshirts, jumpers and sweat trousers reign supreme throughout this range of Sonia by Sonia Rykiel sweats. Perfect for injecting premium luxury to off-duty wardrobes, each innately relaxed design is instantly refreshed by bold hues and statement prints.