Crafting a youthful and contemporary appeal, the Sonia by Sonia Rykiel label was launched by heiress Nathalie Rykiel in 1999. The famed sister brand embraces flairs and charms from the Sonia Rykiel main line, including a Parisian chic vibe and inside-out stitching techniques. Sonia Rykiel , world renowned for her figure hugging 'Poor Boy jumpers', opened her first boutique in Paris in 1968. Embracing a modern and lively aesthetic, Sonia by Sonia Rykiel trousers are expertly fashioned with a colourful charm. With printed casual trousers, versatile leggings and polished, tailored trousers in rich colours, there are designs for all occasions.