Survivors reported that the life preservers were useless and fell apart in their hands, while desperate mothers placed life jackets on their children and tossed them into the water, only to watch in horror as their children sank instead of floating. Most of those on board were women and children who, like most Americans of the time, could not swim; victims found that their heavy wool clothing absorbed water and weighed them down in the river.[9]: 108–113 

t was discovered that Nonpareil Cork Works, supplier of cork materials to manufacturers of life preservers, placed 8 oz (230 g) iron bars inside the cork materials to meet minimum content requirements (6 lb (2.7 kg) of "good cork") at the time. Nonpareil's deception was revealed by David Kahnweiler's Sons, who inspected a shipment of 300 cork blocks.[5]: 71–72  Many of the life preservers had been filled with cheap and less effective granulated cork and brought up to proper weight by the inclusion of the iron weights. Canvas covers, rotted with age, split and scattered the powdered cork. Managers of the company (Nonpareil Cork Works) were indicted but not convicted. The life preservers on the Slocum had been manufactured in 1891 and had hung above the deck, unprotected from the elements, for 13 years.[9]: 118–119 

What a disaster, fuck