The pyjama top isn't really for bedtime. Rather, it is a light, unstructured jacket, with some of the trappings of old-fashioned jim-jams. It has an open collar, which falls low, and is suited well to being worn in a louche and laid-back manner — over a t-shirt, say, or light shirt — ideally in spring and summer.
A curious type of collar, this — previously found only on uniform jackets in the middling second half of the last century. It is asymmetric, in that one side — the under-side when fastened — has a small notch where the curve of the collar begins, enabling things to sit nice and flush when fastened.
There is a split at the end of the sleeves, which makes turning them up much easier. Again — the pyjama top is a resolutely relaxed affair, and outwardly encourages such gestures when the going gets warm.
This is a half-raglan sleeve — halfway between a set-in sleeve and a full raglan — and is what gives the pyjama top its blend of soft shoulder, like a full raglan, but with less smart and sporty lines. The sleeves are lined with a slinky satin to allow arms to slide in and out without friction.
The buttons on the jacket are large, solid horn — dark in colour and matte in finish — and each is a little different from one to the next. They are in that regard as if alpha-keratin snowflakes — such is the beauty of being a product of a high-grade natural material, rather than, say, a plastic replica.
The sleeves of the jacket are fully lined with a slinky satin, making donning and undonning it a breeze, and helping to reduce friction with whatever is worn underneath.
Delicate and lightweight, this cloth, but because of its composite fibres, cosy. A blend of cashmere, silk, and merino wool. It could be for spring, it could be for autumn, it could serve a purpose as a mid-layer in winter. Completely season-agnostic, then.