The Skullerz Lightweight Bump Cap Hat is a comfortable and stylish hat with a ventilated impact-resistant shell for breathable protection against bumps, scrapes, bruises and other minor head injuries. This incredibly lightweight bump cap hat delivers optimal comfort without compromising safety. The removable bump cap insert is made of a lightweight but durable high-density polyethylene (HDPE) with maximum ventilation for all-day breathability that doesn't compromise protection. Such a lightweight safety hat design tackles two big challenges workers face in the field: weight and heat. Machine washable for easy cleaning.