3M Hard Hats are engineered to provide comfort, protection, balance, and stability to help keep DIYers and professionals safe. 3M Non-vented Hard Hat with Ratchet Adjustment for custom, on-head sizing. Suspension sits lower on the head to reduce pressure points and increase security. Features a smooth-turning 4-point ratchet suspension system and provides optimized comfort with 3 levels of height adjustment. Part of the 3M Pro Series Safety Products line, this hard-hat was designed for the way pros think, the way they shop and the way they work