Gentleman wear matching pyjamas with a collar, so if you don't already have a selection of poplin, cotton and linen PJs in your wardrobe, act now. M&S, Uniqlo and Boden offer casual styles – think relaxed tees and checked trousers – and there are button-down pairings from grown-up brands like Turnbull & Asser, Derek Rose and Hamilton & Hare. Just add shearling slippers, a robe and a broadsheet.
Cool Brit label Desmond & Dempsey may have made a name for itself with fun, bold prints, but their more subdued designs are also winners. This simple, classic pair is a safe bet from a brand who really know what they're doing.