DESIGNED BY MR PORTER. Mr P.'s 'Mike' trousers are made from an organic cotton and linen-blend that's comfortable during the warmer months. They're tailored in a classic straight-leg shape and have side adjusters at the waist, so you can forgo a belt. 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.