Freddy ~ I got these rare items at a New Balance Outlet near me in Brighton, MA. They are NB brand as well. I got the XL. These come down o just under my knee.
here is some info
back pocket just under waist has this logo: NBx
when I searched for 3/4 tigths with the NBx logo I found:
http://media.rei.com/media/oo/6e3000...bcf61359bb.jpg
mine have this reflective check pattern graphic on the thigh, but are all black and not this long of course
REI comes back with a women's tight but this is not what I have
http://www.rei.com/product/781371
mine are made in Viet Nam and here are some #s from the labels
SO910 KHM008
MRP 8301
RN# 96937
CA# 05054
RFC NBM 9207825N3