This is Frontier’s double wall silverfoil pack. Some Frontier packs are double wall wax-lined paper. Chili Pepper Flakes are crushed chili peppers – with the seeds. Chili, or Cayenne, pepper stands out as one of the most recognized of the red peppers. Red hot, and delicious. The Heat Level of Chili Pepper is measured on the Scoville scale in ‘Heat Units’. Two common ground varieties are 30M & 90M Heat Units, (30,000 & 90,000 respectively). The 30M pepper is comparable to the canned ‘Red Pepper’ that you find in at the Supermarket. Just about anyone can tolerate 30m (also called 30k) Cayenne. On the other hand, 90m Chili is incredibly hot. So watch it.