I'm with zoom-zoom, every word of it. You know, designers, sport bras are made in all kinds of colors so we can coordinate our bras with those cute tank tops. Then, you can ignore the whole shelf bra thing all together (especially since many of the less endowed don't get enough "headlight" protection from them anyway).

And I'm sick of the only really supportive sport bras having hooks right over my spine where my hydration pack sits. Oh yeah, that is soooo comfy on a rigorous mtb ride.

Of course, front zip bras for the endowed have their own problems (like requiring 4 hands to install). I don't have an answer but then I'm not a engineer.