I have used 3 different string builders the last 10 years..all have padded the loops on FF Flemish twist strings. I think it helps with quietening my recurves. I also think it makes the loops stronger and abrasion resistant. I started using the "skinny" strings on my longbows a couple years ago and loops are padded. Helen prefers endless strings on her target bows, they aren't padded but are served nicely.