LEUCHTTURM1917Self Adhesive Pen Loop Elastic Pen Holder (Rising Sun)

Pros:They attach well and stay adhered.Cons:I saw this noted in other reviews but didn't know how much it would affect me. None of my regularly used pens fit so they were rendered useless.

This is the 3rd Leuchtturm loop I've bought, and the 2nd I've used on a non-Leuchtturm notebook. Doesn't scratch my fountain pens and doesn't come off, even with years of use.