Eiderdown is a jazz instrumental composed by Steve Swallow. It was first recorded and released in 1965 by Pete LaRoca, though the exact album is not specified in the provided content. The piece has become a jazz standard, covered by many artists over the decades. Notable early versions include Steve Kuhn in 1971 and Gary Burton with Stephane Grappelli in 1972, with subsequent interpretations by the Stan Getz Quartet, Bill Evans Trio with Lee Konitz and Warne Marsh, Phil Woods Quartet, and many others up to recent years. The catalog lists 54 recorded versions, illustrating its enduring appeal. The tune remains instrumental and exemplifies Swallow's melodic writing within the modern jazz tradition.