This is the classic "Cats Under the Stars" album art, originally designed by Stanley Mouse. The original design features a silhouette cat reclining in an Egyptian sphynx like pose. The cat rests on an inverted blue triangle and has rays of aqua fanning in a semi-circle behind it. The original album cover has been updated and has feathered wings of deep blue.
This rendering is in a batik style, made by Tina Carpenter while on Grateful Dead tour many years ago. Since then Tina has become a celebrated batik Grateful Dead artist and has licensed many batik designs with the band.