Thrasher produces enormous milky-white stems that are densely fibrous but hollow. The parasol shaped caps are a light tan/beige colour with some variance in size and shape. Unlike most cubensis strains with golden caps, Thrasher shows heavy blue bruising on the caps also - a good visual indication of this strain's potency.
 
Thrasher has a reputation for being extremely visual, but otherwise only moderately potent. That is, you’ll see more but be less high than you would on another strain at a similar dose.