Some fiberglass hoods are lighter (and weaker) while some are still heavy. The good ones from company's like cervini are still heavy and have the safety catch still on them. My 1.5 cowl hood from cervini's (which i put on) saved very little if any weight. Others from different company's i helped friends put on, literally weighed almost nothing, downside was no safety catch. The thin ones also float around under speed, kind of unsettling if you ask me. Like they are begging to come unhooked.