Only in the world of high density trash bags would a little bantamweight 22 micron thick bag count as Extra Heavy. But that’s what’s so unique about High Density Polyethylene (call him HDPE for short.) This fascinating resin is extremely tough for its size, and punches way above its weight. They may be light as a feather but these heavy duty high density garbage bags can carry loads of up to 100 lbs without a problem. Just avoid disposing of sharps in these bags as they could cause punctures.