Observations of the solar wind proton component made between July 1965 and June 1967 on the twin Vela 3 satellites are analyzed to give a statistical description of solar wind properties. Distributions of the observed proton density, flow speed, flow direction, thermal anisotropy magnitude, and anisotropy orientation are displayed; average values, standard deviations from the averages, median values, and ranges are given for this set of measured properties. Relationships among the solar wind properties are discussed. The distributions of the logarithm of the proton temperature, at differing flow speeds, are nearly normal, with a constant standard deviation from an average that increases with increasing flow speed. Statistical description of several basic plasma parameters and the measured solar wind properties under ‘quiet conditions’ are also presented.