Basically a string bikini panty with 2 strings instead of one ...

  http://www.atkgallery.com/galleries/01/set26/

Bikini Version:

 http://www.egotastic.com/entertainment/media-files/pictures/victorias-secret/victorias-secret-bikini-heaven-004168

at the bottom of this link:

  http://www.dacahard.com/y200607/202/gall.htm

Thrice is NICE, too ! http://www.pornnavigate.com/gallery/763/index.html

http://smoothskinnedsex.com/emilypreview/index.htm

 "interpretive" double strap

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http://www.wifeorgasm.com/mulligans/0eb863/

http://alex.crocogirls.com/sweet-girl-outdoors/

from hotamateurmilf

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hey muffin...those count for sure!

thanks for the contributions...

another "thrice":

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 ebony chick from hoodhoney

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http://www.epicgals.com/hh20/affiliates/?SWISS

http://www.epicgals.com/hh1/affiliates/?NEWGALS

 nice milf

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 hot set from nikki sims /  nextdoornikki

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and from karen dreams

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gottalovelucky

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found a winner!!!

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----taking a little liberties here: (multi)

 http://www.dailypoa.com/?p=2253

  http://www.teen-plaza.com/free_abby_winters_galleries/Kylie/

  http://www.teen-plaza.com/free_abby_winters_galleries/Kylie/

 debbie milf from karupsow

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 other karups girl

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jaclyn karupsow

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wait for it....

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----nice links above, muffin man, btw!

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 kates playground

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 karups jasmine 2

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 kira from allover30

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http://galleries.allover30.com/K/Kira/Action01/v1/

 blueyed cass

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 your caitlynn

http://www.yourdailygirls.com/galleries/your_caitlynn_72/

 kendra from karups

http://www.thecunts.net/ha/outdoors/qdqc7/cuntsarea.html

[quote user="muffin man"]

redhead karupsow milf

http://www1.karupsow.com/488193/kow/pictures/kow-22/ginger.html

[/quote]diff set, same girl...

  http://www.hottiecollection.com/page/7/

 jasmine 2

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camille

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 judyjade

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 michele 2 from karups

http://www.karups1.com/pc/exotics/5swwh/index.html