One box had been opened but all envelopes are there. The product is a pack of 100 10x13x2 Tyvek envelopes, ideal for professional packing and shipping needs. Made from durable Tyvek material, these envelopes provide reliable protection for documents, small items, or samples. The size of 10x13x2 offers ample space for various mailings, making them a practical choice for businesses or individuals requiring efficient and secure shipping solutions. With a quantity of 100, these envelopes offer convenience and value for money in a range of mailing applications.