Top: It's a long-sleeved top with a collar and a button-up placket (partial opening at the front with buttons), resembling a kurta or a long tunic. The sleeves appear to be full-length or three-quarter length.
Bottom: The bottom piece is a draped garment, similar to a lungi or a wraparound skirt, which would offer comfort and ease of movement.
The overall style suggests a comfortable yet elegant sleepwear or loungewear option. The gray color adds to its sophisticated and calming aesthetic.