I have been wearing these Reef leather slides for 4 summers now and decided to engrave them for one last summer (they are bound to break soon). What I love about reef leather slides are they are laser safe (PVC free) and fit well in the GF on its own. Just keep in mind that some of them have soles that might have PVC and so I would not engrave other parts of the sandals without verifying there is no chlorine. Always look at the full product detail if you are wanting to find similar ones.
Settings were full speed, 71 power, 225 LPI
Here is a link to one laser friendly set: Amazon.com
The ones I did are pretty old so I do not have an exact link and forgive how dirty they are.
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