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Tyvek envelopes are envelopes that appear to be paper but are actually made of spunbonded plastic fibers. They are usually white and do not tear easily (such as Fed Ex envelopes). Quick delivery service companies often use Tyvek® envelopes. When a stack of Tyvek® envelopes has been collected, they should be placed in a large Inter-office Mail envelope and sent directly to:
IGCN Room 045.