Womens Green Trousers at M&S Women's Green Trousers at M&S Racing Green Racing Green Slim Dark Green Trousers Howlin' Green Cosmic Trousers Howlin' by Morrison. 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.