The certified wind tunnel used for the testing is equipped with a 30' (9

Insulation Package: 100% Aramid

Faux fur ear flaps

quilted polyester liner for warmth and concealed

UPC 843574005619 Material Low Density Polyethylene

JSP® EVO® 6151 Ascend™ Vented, Short Brim Safety Helmet with HDPE Shell - 280-EV6151SV-CH Type_Head Accessories The certified wind tunnel usedJSP EVO 6151 Ascend Vented, Short Brim Safety Helmet with HDPE Shell 280 EV6151SV CH Features: Vented High Density Polyethylene (HDPE) shell designed with five raised channels running across the top for strength, and an extended back area for extra protection EPS (Expanded Polystyrene) liner helps absorb impact Unique "3D Adjustment" provides a precise fit using harness depth settings unlike any other hard hat on the US market today Revolution Wheel