The vest has to leave room for the shirt
I would decide this black button-up knit by what fits underneath.

A vest is not automatically an easy layer. It can remove the sleeve problem and replace it with an armhole problem, which is not the promotion I want. I would consider the SO ME Cable Quilting Stitch Button Up Knit Vest for its place over plain shirts. Before keeping it, I would want enough room for that shirt to move. A photograph cannot conduct that negotiation on my behalf.
The composition is listed as 80% Rayon, 20% Nylon. BLACK is the colour offered, with M, L and XL available in the supplied live evidence. Cable quilting stitch and button up come from the product title. I would not turn the word quilting into a claim about padding, insulation or a separate filling. None is specified here. A detailed name can still leave practical questions unanswered.
My first outfit suggestion would be a white shirt with straight black trousers and black loafers. I would keep the collar plain and check that the shirt sleeves can move without pulling against the vest openings. The black-over-white contrast would do the visual work. I would not add a tie merely because the outfit includes a collar. There is no attendance register to sign.
Second, I would propose a cream long-sleeved top, dark straight jeans and flat ankle boots. This would make a less formal base than the shirt version. I would compare the two necklines on arrival and check that neither bunches beneath the other. Layering is useful only when both garments are permitted to lie down properly. More fabric is not automatically a better outfit.
For a third direction, I would try it over a plain navy shirt dress with dark tights and low shoes. I would inspect where the vest hem meets the dress, and whether the dress waist becomes awkward beneath the buttons. I cannot guarantee that proportion because the supplied listing gives no garment length. It is a suggested fitting-room combination, not evidence that this exact pairing has been tested.
My arrival checks would start with the inside label, then move to the button attachment and the finishing around the armholes. I would fasten it over the intended layer, reach forward and sit. I would look for fronts that do not pull apart between buttons. I would also check it open; if the edges refuse to sit where I want them, I would not spend the day repeatedly arranging them.
There are no care instructions or garment measurements in the supplied listing. I cannot tell you to wash or dry it a particular way, promise a fabric feel, or assign measurements to M, L or XL. I would ask for chest and length information before ordering if those are decisive, then read the sewn-in care label on arrival. Rayon and nylon percentages are not a complete cleaning instruction. I prefer the real instruction to a confident guess.
Skip this if you need a fully specified care routine before buying, want natural-fibre-only knitwear, or dislike checking layers together. Tidilo is our sister shop. My verdict is a conditional yes for a black vest that serves clothes already in the wardrobe. It should solve a dressing problem, not create a new collection of shirts to accommodate it.
- M