Hybrids: The combination of one type of string for the mains and another for the crosses is called a hybrid. This is done for durability. Frequent string-breakers should go with a stiff aramid fiber like Kevlar for the mains (the strings that usually break first) and a softer synthetic for the crosses. Hybrids last long but can produce a boardy feel. Two of the most popular prepackaged aramid hybrid sets are Gamma Infinity and Prince ProBlend. Some newer hybrids offer a polyester/synthetic gut (or natural gut) combination for a more forgiving feel than Kevlar-based hybrids. Wilson Ultimate Duo, Wilson Champions Choice, and Pacific PolyGut ATP Blend are 3 great options.