TRUFFLE X - Our Softest and Most Elastic String Ever Meet Truffle X, our breakthrough ultra-soft tennis string engineered from a new polymer — not polyester. This innovative material delivers unmatched elasticity and comfort, making it the ultimate modern replacement for traditional multifilaments. Where multifilaments shred, lose tension, and die out quickly, Truffle X holds strong, maintaining feel and playability while offering a uniquely plush response. Truffle X has an insanely low static stiffness (think comfort) For context, here are the static stiffness ratings of other strings for comparison: Truffle X - 0.20 kg/mm Babolat Natural Gut VS Touch 1.30 - 0.55 kg/mm Tecnifibre NRG2 1.32 - 0.58 kg/mm Wilson NXT 1.30 - 0.67 kg/mm O-TORO - 0.95 kg/mm Babolat RPM Blast 1.25 - 1.18 kg/mm The dynamic stiffness is comparable to many top selling multifilaments on the market. Gauge: 1.30mm (note: due to its elastic nature, Truffle X stretches under tension, resulting in a slimmer effective thickness) Performance: Ultra soft, elastic, with explosive ball pocketing and pop. Hybrid Use: Designed as a cross string, Truffle X pairs best with an ultra-slick co-poly main such as O-TORO, creating a blend of plush comfort and spin-loaded snapback. Tension: While tension is personal to each player, we recommend stringing Truffle X at the same tension you would use for natural gut or a multifilament. Our team found 55 lbs with a 5% prestretch to be an ideal starting point. With its modern polymer composition, Truffle X brings a new standard of comfort, feel, and elasticity to players who have long relied on multifilaments — but demand better durability and performance. ⚠️ Important Notice Truffle X is made from an ultra-soft elastic material. Please exercise caution during installation: Do not apply more than 35 lbs of force when tying off knots. Be gentle when tying off knots, avoid overpulling or damaging the string.