Encyclopedia
Kapok
1. Kapok, the commercial name for pale yellow or sometimes reddish-brown down obtained from the surface of seeds of various trees belonging to the Bombacaceae family. Fibers measuring 15–30 mm in length, depending on the variety, are elastic, water-resistant, lightweight, yet brittle
Source: "Explanations to the Commodity Nomenclature of Foreign Economic Activity of the Russian Federation (HS FED Russia)" (prepared by the Federal Customs Service of Russia) (Volume 1, Sections I - VI, Groups 1 - 29)