The foreman insisted that every worker wear a construction helmet before entering the site.

The museum displayed vintage crash helmets from different eras, drawing a crowd of curious visitors.

Before the trip, he tightened the strap on his crash helmet and checked the lights.

The museum's exhibit displayed several close helmets from the sixteenth century.

A flock of helmeted guineafowl scratched through the leaf litter, sending up a scatter of startled sparrows.

The purple helmets on the rack belonged to the volunteer team.

She adjusted her space helmet before stepping onto the lunar surface.

The diver found a rare helmet snail nestled among the coral.

At low tide, helmet snails grazed slowly across the exposed reef, leaving slimy trails behind.

The manufacturer tested the helmet shells under extreme conditions before shipping them.