National Duplex Sandwich Cookies in a 35g pack are a sweet, creamy Jamaican sandwich biscuit — two biscuit layers filled with a sweet vanilla cream centre, in the classic duplex format. The 35g size is the everyday lunchbox or pocket pack. Particularly good with a cup of tea, in a school lunch, or as a quick sweet snack. National is one of the longest-running Jamaican bakery brands, and the Duplex sandwich cookies are one of the more popular biscuits in their range — a familiar comfort biscuit for anyone who grew up around Jamaican biscuit aisles.