Designed for repeated use, double prong metal clasp is durable and eyelets are reinforced. Perfect for everyday home and business use, ‘s clasp envelopes are constructed from extra heavy-duty 32 lb. brown Kraft stock designed to give contents extra protection during storage and handling. In addition to the clasp closure, these envelopes have a moisture activated secure seal with deep Gumming on the flap to create a permanent seal. Great size for mailing and storing over-sized documents flat when folding is undesirable. Conveniently packed in 100 count to reduce frequency of purchasing.