Clockwork's Shades is an accessory that can be found on the first floor of the Clothing Store and purchased for 52 Bucks. Purchasing this hat will allow you to wear it only in Adopt Me!, unless you purchase it for Robux from the Roblox Catalog.
The description of this item on the Roblox Catalog reads:

"Straight from the ROBLOX archives, these shades are on limited release to commemorate interns from summers past. They're insanely expensive, because that's how Clockwork rolls..."