HOW WE TEST

Our testing team put 29 base layers through their paces, wearing each one for at least three outdoor workouts. We asked them to feed back on how the tops felt before, during and after exercise, noting temperature regulation, sweatwicking and ability to move with their bodies. Tops were also awarded extra points for offering a good fit, feeling comfortable and looking good, with special mentions for useful features such as thumb holes and hidden pockets.