White Bouffant Caps, 24", Bagged, 500/case Cool and Comfortable Bouffants. 100% non-woven material (polypropylene) is breathable so your head stays cool and protected Lightweight polypropylene is durable and low lint, too. Bouffants are FDA approved as a hair restraint. Elastic headband is Latex-free, no worries about allergies. Choose 18in, 21in or 24in opening size. The size bouffant you need is based on the volume of hair. More hair means you need a bigger bouffant.