The string of choice for Stan Wawrinka, this durable co-poly string is very, very spin friendly. The slick surface of RPM Blast allows the main strings to slide out of alignment, grab the ball and then snap back to add spin to the shot. While all co-poly monofilaments do this to some extent, our lab tests confirm that RPM Blast is exceptional in this regard. Though RPM Blast offers a slightly softer feel than traditional polyesters, it is by no means the softest co-poly available. It is an ideal choice for big hitters with heavier racquets seeking maximum control, durability, and spin.
A solid all-around synthetic gut offering a surprising range of playability for a solid core nylon string. The 16 gauge version offers more durability and control, but a slightly stiffer feel compared to the 17 gauge version. This is a great option for players who want decent all-around performance without breaking the bank. It's also a very economical way of softening up a poly hybrid.
For players whose style is almost at the competitive level, who use standard or medium-size rackets and are looking for performance or resistance. Double wrap polyamid. Extra elasticity for more power: 18% better elasticity than conventional synthetic gut (single wrap). One of the benchmarks for competitive players because of its power and touch.
Made from uniquely refined co-polymer polyester with a soft molecular construction, Sonic Pro string offers excellent control and touch. Though polyester strings are stiffer, durable, and more control-oriented, Sonic Pro is soft-feeling and offers a livelier response.
HEAD Ultra Tour 16 is a monofilament copolymer/polyester mix string designed for durability with the benefit of a soft elastic feel. Perfect for power players, Head Ultra Tour 16 offers good spin, durability and control.
Durability meets playability in this very user-friendly co-poly with impressive tension maintenance. This thicker gauge is ideal for super open string patterns, especially for big hitters with durability concerns.