Jumper by Sisley, Plain design, Understated cool, Off-the-shoulder design, Ruch detailing, Long sleeves, Regular fit - true to size. Since its French debut in denim in 1968, Sisley has become known for its casual-chic attitude. With a philosophy centred on design-led classics, tailoring, jersey tops and knitwear join the ranks in interesting fabrications and cute cropped cuts.