Suits Slim Fit Herringbone Trousers Racing Green Slim Straight Fit Forest Green Wool Gabardine Trousers Orlebar Brown Griffon Tapered Linen Trousers Green Orlebar Brown Linen Trousers Olive Green Charles Tyrwhitt UK. The Robin Trousers are the perfect pyjama style pants: stylish, flattering and comfortable as any other. They have an elastic waistband for a more comfortable fit. Handmade in our atelier with the beautiful green Costume fabric from Liberty Fabrics, 100% cotton. Please read in detail the measurements of each size below, in case of doubt between two sizes we advise you to choose the smaller one.