Whenever I travel to destinations with unpredictable or varying weather, I toss this lightweight shell in my suitcase. It takes up little space and is almost weightless. On those days when a tee is too light and a puffer too heavy, it serves its purpose. This is an old Moncler piece (continuing to shop my closet!) but there are plenty of new options that work beautifully.
Hogan sneakers similar
Toteme cashmere hat (so warm and a great purchase!)