Bluegrass waipiti d3o elbow guards every detail of the wapiti d30 has been designed to provide the best protection and ease of movement the d30 inserts are made of intelligent material that are free flowing when at rest and harden on impact featuresd3o core soft when at rest giving full freedom of movement yet hardens instantly on impactsoft pads two soft pads stitched from the outside for better protectionvaportech light better moisture transfer means better comfort thanks to the mesh