Hybrid strings are created using a combination of two different strings for mains and crosses. The mains run parallel to the racquet handle and the crosses run perpendicular to the racquet handle in the racquet fame. In a uniformly strung racquet, it's just about always the main string that breaks. This is because the main strings move a lot more than the cross strings so the cross strings "saw" into the main strings, causing notches and eventually breakage. In a hybrid string set, usually a durable and/or highly repulsive string is used as the main string, such as aramid strings or polyester strings. As cross strings usually highly elastic multifilament strings or natural gut strings are used to provide comfort, resilience and feel.
Currently, Polyfibre has developed two of the most popular prepackaged hybrid sets. Its main string is a blend of specially modified Aramid fibers and fine polyamide filaments which provides excellent durability and abrasion resistance. The cross string is the premium synthetic gut that produces increased return- energy to the ball.
There are millions of possible hybrid string combinations. Polyfibre provides a full line of 200-meter string reels and a list of recommended string combos that allows player to create his or her own unique hybrids.