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Each Sobakawa pillow is filled with 100% buckwheat hull: the only pillow that provides adjustable support cushions and keeps your head cool. Sobakawa Buckwheat ruffles provide adjustable support for the head and neck: adjustable support provides comfort for the neck, back and head. Sobakawa 'S NATURAL BUCKWROAT KEEPS YOUR HEAD COOL: The buckwheat shell repels heat, allowing air to flow between the shells. Lifespan: Truly the last pillow you ever need to buy. Tip to tip measures 29 inches wide x 19 inches deep; Product description Each Sobakawa pillow is filled with 100% buckwheat hull: the only pillow that provides adjustable support cushions and keeps your head cool. Sobakawa Buckwheat Ruffles provide adjustable support for head and neck: adjustable support provides comfort to the neck, back and head.; Product description Each Sobakawa pillow is filled with 100% buckwheat hull: the only pillow that provides adjustable support cushions and keeps your head cool. Sobakawa Buckwheat Ruffles provide adjustable support for head and neck: adjustable support provides comfort to the neck, back and head.; Each Sobakawa pillow is filled with 100% buckwheat hull: the only pillow that provides adjustable support cushions and keeps your head cool. Sobakawa Buckwheat Ruffles provide adjustable support for head and neck: adjustable support provides comfort to the neck, back and head.