Compressed Zip File
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Nerd Glasses Digital Graphics, INSTANT DOWNLOAD, modern glasses clipart, clip art, commercial use ok
PNG: if you want transparent backgrounds, PNGs are the way to go. Many programs can open PNG files. If you aren't sure if yours can, try to import a picture and check all the formats that you can open from the drop down menu.
14 PNG files of the sunglasses pictured above.