From Canopus' website:

"Canopus Back Beat snare wires have been developed to emphasize the back-beat – especially in high volume situations where the snare sound may feel like it is being buried by other instruments.
Maintaining these qualities of the standard Canopus Back Beat wires, we have developed the extra wide 42 strand snare wire – which allows the drummer to play comfortably, without straining, while delivering a full, pleasing snare back-beat at all volume levels.

We have eliminated 2 common problems of other wide snares: 1) Canopus 42 strand snare wires do not mute the resonance and response of the drum. 2) We have controlled the indistinct sound created by excess snare buzz.

Furthermore, the 42 strand snare uses high quality nickel plated wires which highlight every nuance of sound and vibration and yet have a controlled response and sustain."