String leeches are great. The original ones feel apart quickly, the next ones had kevilar and were more durable (I got 2000 shots) Now there are Stealth Leeches and these are truely durable. I got a pair from my dealer who was given a sample at the national archery show. I haven' t seen these anywhere yet, but they must be coming out soon. By the way they work great and they look different than the first two leech versions. These have a longer contact area on the string.

Good Luck!