do u mean the allergan inspira range? the cuis have a 10yr gaurantee against spontaneous rupture but the inspira ones have a lifetime gaurtantee of this, they have a thicker shell and the gel is more or less cohesive (i get mixed up lol) there are 2 different kinds..soft touch and responives..the soft touch r slightly firner so less chance of rippling but they bth cost about £400 more than the cuis x