Good value, journeyman roundwound strings for bass. These have a nice tone and last a long time for a fair price.
These are steel strings as opposed to nickel wound so I guess this has something to do with the lasting tone and good longevity.
Also, I believe these strings are cryogenically frozen (!?!?) to -300 or thereabouts which apparently causes the string/metal to contract and squash out the spaces that would normally be between the winding of standard strings. This is supposed to be better for tone and promotes less transients and odd, unwanted sounds from the strings. Apparently.
I'm not 100% sure on this technique but they do seem to sound really good so I'd suggest Mr Markley's scientists know more than I do about the subject.
Would recommend for bass players of all levels and styles.