Ralph Lauren (Black Label) light blue sleeveless cashmere sweater.  Turtle neck.  Made for Bergdorf Goodman (US department store).  New RL Black Label cashmere sweaters retail for $700 US+

There is one pull on the front below the neckline.  See pictures.  This item has been dry cleaned.

Made in Hong Kong

100% Cashmere

Size M
Underarm - 17 in/43.25 cm
Length - 20.5 in/52 cm