Liturgical Time recently posted about it as did Dymphna's Road.
Anyway, I wear the kerchief style tie-back veils because I'm a mess when it comes to the lace mantillas. If there isn't a comb sewn in (thank you, Veils by Lily), then forget about it. The mantilla is blown off by the wind down Central Avenue or pulled off and stuffed into the mouth of my nearest toddler. Ha ha.
But this video is a great tutorial not just on mantillas, but other styles as well! Enjoy!