Howlin' Green Cosmic Trousers Howlin' by Morrison Slim Fit Twill Trousers Green Oscar Jacobson Robins Jeans Robin's Jeans Long Flap Tie Dye Green Winner Grailed Green Cotton Linen Trousers Women's Trousers Brora Fashion. 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.