EXCLUSIVE AT NET-A-PORTER. Loulou de Saison's timeless knitwear will be a staple for years to come. This 'Aidar' cardigan is knitted from soft merino wool and cashmere-blend for a relaxed, boxy fit. Lower-Impact Materials. This product is made using at least 50% lower-impact materials or ingredients. Find out more about our NET SUSTAIN criteria here.