Each bubble mailer contains a strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely. Bubble mailers are convenient, lightweight, and will help to save on shipping costs. Padded mailers are a cost-effective and efficient way to ship all your packages. Perfect for small business and e-retailers. Eliminate the need for costly shipping boxes and tape by using padded bubble mailers instead - savings add up!