This a review of the Toalson Rencon. Toalson Rencon is a polyester tennis string in 17 gauge. I has textured surface which provides increased levels of top spin. The string is quite firm but not uncomfortable. Personally, the single biggest drawback was the low-powered nature of the string. One really has to be able to generate a lot of power in order to give pace to the ball while using Toalson Rencon. I strung Toalson Rencon on my Babolat Pure Strike Tour at 25 kg.