WISE images of the bow shock candidates around 6 OB stars. Color mapping: blue = 3.4 microns; green = 12.1 microns; red = 22.2 microns. The color scales are in data numbers (DNs); the WISE data is not calibrated in their surface brightness. The vectors indicate the direction of the star proper motion: the thicker one represents the one derived from Hipparcos data by van Leeuwen (2007); the thinner one is the same but corrected for the ISM motion caused by Galactic rotation. The vectors length are not scaled with the original values.