Draw a large oval shape for the helmet body
Add a horizontal line across the lower front for the face opening
Sketch the front edge of the face mask opening
Draw the ear hole on the side of the helmet
Add the chin strap area below the opening
Draw the face mask bars extending from the front
Add curved support bars connecting the mask to the helmet
Sketch the top ridge along the helmet
Add side padding lines and panel seams
Draw the chin strap buckle details
Add a small logo or stripe on the side
Refine the outline and smooth the curves
Erase extra guide lines
Shade or color the helmet