Why are they so popular?
The buckwheat hulls make the difference. They allow air circulation and support the sleeper's head. Makura are great for reading or watching television, and the half-size is particularly suited for travel, camping, and massage therapy.

Makura: Buckwheat Hull Sleeping Pillows
Used for generations by the Japanese, these firm pillows gently conform to the sleeper's head, lending support in all the right places. The unbleached cotton muslin sack is enclosed in an attractive fold-over pillowcase of soft 100% brushed cotton. (Full Size 14'' x 19'', 4 lb, Half size 14'' x 10'', 2 lb)