Measured ${\rm f_1(1285)}$ mass as a function of $\pt$ at midrapidity ($|y|< 0.5$) in minimum-bias pp collisions at $\s$ = 13 TeV. The statistical and systematic uncertainties are shown as bars and boxes, respectively. The blue band represents the world-average value for the mass of ${\rm f_1(1285)}$ having an uncertainty of 0.5 MeV/$c^{2}$.