Assertion: football helmet | /r/MadeOf | polyurethane or nitrile foams
Facets:
Source sentences:
text: Most football helmets are made from polyurethane or nitrile foams, because they keep the force peak under the load recommended for head health (1.5MPa) without deforming, while being relatively lightweight and easy to manufacture.
text: Most football helmets are made from polyurethane or nitrile foams, because they keep the force peak under the load recommended for head health (1.5MPa) without deforming, while being relatively lightweight and easy to manufacture.