Family-run and rooted in northern Portugal, Portuguese Flannel is known for its fabric-first approach. Made from a textured cotton-blend in an open-knit construction, this slightly sheer camp-collar shirt is cut in a boxy fit; wear it with swim trunks or tailored trousers alike.Lower Impact Materials. This product is made using at least 50% lower-impact materials or ingredients. Find out more about our Consciously Crafted criteria here.