Some companies will use the same sub-angular silica sand for topdressing your putting green. This is the same sand that will cut and saw at the blades, and decrease the lifespan and longevity of your putting green. Southwest Greens uses black and green round ball bearing silica sand for topdressing. The round ball bearing silica sand will increase the longevity of your putting green and will give it a nice color. Why don’t all companies use black and green round ball bearing silica sand to top dress the putting greens, because the cost is 3 times as much as sub-angular silica sand.