Wood wool

U.S. Patent 6,183,579 on a method of making cooling pads of excelsior, and illustrating such a pad

Excelsior is a wood product made of aspen fibers, used in packaging, cushioning, stuffing of stuffed animals, and for the cooling pads in home evaporative cooling systems known as swamp coolers.

Excelsior, dyed green, makes an annual appearance as the "grass" in Easter baskets.

Traditionally used in stuffing Teddy bears, it is still used in stuffing the muzzles of some collectible bears.

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