When it comes to pyjamas, we think the simpler the better. Polo Ralph Lauren 's black trousers (and the matching T-shirt ) are made from smooth stretch-modal and topped with a discreet tonal logo waistband that stays secure throughout the night and won't pinch or rub. - - Black stretch-modal - Elasticated logo waistband, on-seam pockets - 94% modal, 6% elastane - Machine wash