Our padded envelopes are puncture and moisture-resistant to keep items safe during shipping. The interior fibers of these padded envelopes expand as the package is handled to provide consistent cushioning. Close them with tape or choose self-sealing mailers and secure your shipment quickly and easily. One important note to remember is that while these padded mailers provide excellent cushioning properties, they offer NO stacking strength. So if your product is something that can be easily crushed, you will want to use a corrugated box or mailer.