The Fifth Dimensions unique sound lay somewhere between smooth, elegant soul and straightforward, adult-oriented pop, often with a distinct flower-power vibe. Although they appealed more to mainstream listeners than to a hip, hardcore R&B audience, they had a definite ear for contemporary trends; their selection of material helped kickstart the notable songwriting careers of Jimmy Webb and Laura Nyro, and their biggest hit was a medley from the hippie musical Hair, Aquarius/Let the Sunshine In. The groups soaring, seamless harmonies were given appropriately sweeping, orchestrated period production by Bones Howe, which often placed their records closer to California-style sunshine pop. Thats actually part of the reason why the best singles from the Fifth Dimensions heyday of the late 60s and early 70s still evoke their era with uncanny precision.