The Bionik 703 semi-mallet putter head surrounds an integrated lightweight thermo-plastic urethane (TPU) insert. This head has enhanced perimeter weight, high MOI, and provides great forgiveness. The softer insert gives a muted feel and sound at impact.
The main body you see at address acts as an effective alignment guide with bold sight lines that direct you to your target. The 703 has a plumbers-neck style offset to position the hands ahead of the putter.
Buy the recommended shaft, the Apollo Straight Putter shaft, here!