What materials are the chutes made out of?
A Stoppem/Dragnium blend.
Is that true about Victoria Secrets?
No. Twas Agent Provocateur. Victoria's Secrets don't operate in the States.
How many chutes are many a year!!
Many, many.
Also when is a chute deemed no longer useable? after so many deployments?
When the poor Ops SAC who has to collect it can put his whole fist through the holes.