Players who are primarily concerned with playability will look for a high resiliency rating whereas players looking for longer string life will choose a high durability rating. (see individual ratings listed for each string.)
Causes of string breakage: hard hitting, top spin, cracked grommets, cold weather and strings with a low durability rating.
Chronic and frequent string breakers can experiment with Kevlar or Zyex main strings since the main strings usually break first. Blending these durable main strings with more resilient cross strings will improve playability.