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Mapefibre ST 50 Twisted are class II structural polymer fibres, in compliance with EN 14889-2:2006, with a length of 50 mm respectively, developed to improve the performance characteristics of conventional concrete, pre-cast concrete and shotcrete. Mapefibre ST 50 Twisted represent a valid alternative to traditional reinforcing techniques (such as electro-welded mesh and/or steel fibres) when used to distribute loads, to limit crack phenomenon due to plastic shrinkage and to produce high-ductility concrete and normal-setting, accelerated-setting shotcrete (safety layers and/or final layer in tunnels and trenches and on rockfaces, walls of water channels, etc.). The advantages of these products include ease of handling and loading into mixers and a low specific weight per cubic metre, which also makes this technology competitive from a logistics and site management point of view. Mapefibre ST 50 Twisted are supplied in 3 kg plastic bags