3m™ hard hats are engineered to provide comfort, protection, balance, and stability to help keep professionals and diyers safe. 3m™ vented hard hat with ratchet adjustment has comfortable suspension that sits lower on head to reduce pressure points and increase security. featuring a vented design to help wearers stay cooler. offering lightweight protection and durability, 3m vented hard hat with ratchet adjustment is part of the 3m™ pro series safety products line which was designed for the way pros think, the way they shop and the way they work