You cruise the aisles peering through the once-transparent polyethylene dust covers, and lift one to find out how things are faring underneath, and the accumulated dust falls all over you. Polyethylene requires the careful attention of staff to rig combinations of shower hooks, Velcro, etc. Tyvek can be sewn on a machine, so can be farmed out to the loving corps of sewing volunteer ladies. Score one for Tyvek. Tyvek wins hands-down.
Most regions have a dispo clothing manufacturer to make union-mandated work clothing.
But I don't bother, since I don't enclose collections permanently and in close contact with the Tyvek. Dust covers seem to me to have enough air exchange to minimize the problem, and we don't bother with archival quality for polyethylene dust covers either. JB Freeman, Marketing Rep at Dupont, is anxious to find uses for the material, but has heard only from art handlers, who are perhaps less picky than conservators about materials. Mr. Freeman is most genial, and is happy to send samples. Mailing envelope weight is somewhat lighter.