The hot item at Tuesday's one-day-only Google Glass public sale was the "cotton" colored frames, which sold out in a matter of hours once the wearable tech devices became available.

The sale was part of an expansion of Google's Explorer program, in which they allow a small pool of users to wear Glass and help experiment with different capabilities before it becomes widely available.

The company said today that all of the new spots in their Explorer program had been filled up during the one-day sale.

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Shortly after 3:30 p.m. Tuesday afternoon Google announced that it had sold out of white frames.

"Wow, what a morning! We're happy to see so many new faces (and frames) in the Explorer Program. Just a quick update that - ack - we've sold out of Cotton (white), so things are moving really fast," the company said on Google +.

The frames also come in colors like charcoal, shale, tangerine, and sky. The cost of the device and joining the program is $1,500.

Google declined to say how many devices were sold during the sale.

"All spots in the Explorer Program have been claimed for now," the company wrote shortly after midnight today, "but if you missed it this time, don't worry. We'll be trying new ways to expand the Explorer program in the future."

An attendee tries Google Glass during the Google I/O developer conference, May 17, 2013 in San Francisco, Calif. (Justin Sullivan/Getty Images)