X-Bionic Effektor SS Power Base Layer Top Features: 3D BionicSphere system on back and chest, X-Bionic Partial Compression, Neuro-Response, Heat Transfer Zone, Supporting and Isolating Aera, Supporting Rips, Neuro-Response, SweatTraps Material Technische Komposition 87 % Polyamid 8 % Elastan 5 % Polypropylen