Kapok is a fluffy, silky yellowish fiber, similar in feel to milkweed or down. Kapok is similar to cotton in that both fibres are found around the plant seeds, rather than extracted from the stem or leaves. Individual fibres are 1.2 to 3.6 (0.47 to 1.41 inches)long, averaging 1.9cm (0.78 inch), Kapok is a moisture-resistant, quick-drying, resilient, and buoyant fibre. Typical analyses indicate that the Kapok fibers comprise 64% cellulose, 13% lignin and 23% pentosan. The hollow core makes kapok very light, 8 times lighter than cotton by volume. Kapok is chiefly cultivated in Asia; the kapok fibre important product of Pakistan.
Kapok Fibre has been used in spinning for knitting and weaving, Kapok is also used as stuffing for pillows, cushions, zafu and upholstery, as insulation material, and as a substitute for absorbent cotton in surgery. The Kapok Fibre has been used in life preservers and other water-safety equipment. During the war, kapok was employed for insulating tanks, for lining aviation suits, for filling floats of army assault-bridges, and generally for replacing cork wherever lightness, moisture-resistance and floating power were needed. Kapok also used to fill life jackets.