The New Narucross EX rubbers have the Narucross cross system PLUS the Narucross tension in its maximum form! Maximum tension resulting in maximum power and performance without speed glue. Recommended for using without speed glue, for best speed-glue performance. Narucross EX is available with EX Soft (softer sponge) and EX Hard (harder sponge). Soft version is very spinny with more control; Hard verson is speedier with good spin.