Why in the world would anyone want to buy a "closed eye heddle"?
The fact is that for very fine and delicate threads, these heddles slip and slide amongst your warp ends with less abrasion, and therefore are preferable to use with our beautiful fine single ply linens. The reduction of "fuzzing" is simply amazing. It may seem as though they are difficult to thread, but it is not nearly so bad as you might think.
These heddles are also useful for very dense warps, such as rep with fine threads, where you have heddles crammed in very tight together on each shaft.