EXCLUSIVE AT NET-A-PORTER. Andres Otalora's 'Un Ritmo' dress is made from certified plissé-linen - the pleats fan out so beautifully through its length. Zoom in on the straps to appreciate the covered beading. Lower-Impact Materials. This product is made using at least 50% lower-impact materials or ingredients. Responsible Craftsmanship. This product promotes artisanal skills and a brand that invests in communities and adheres to fair-trade principles. Find out more about our NET SUSTAIN criteria here.