Indigo And Blue Mélange Cotton-jersey, Crew Neck, Ribbed Trims, 100% Cotton, Machine Wash. J.Crew is one of MR PORTER's hero brands when it comes to sourcing well-made wardrobe basics. Case in point, this sweatshirt is made from naturally breathable cotton knitted from tonal-blue yarns for a mélange-effect finish. The ribbed borders give subtle structure to the semi-fitted shape.