1.The size is perfect for shipping smaller items or clothing items,fits almost all types of clothing.2.The tape peels off easily and seals sturdy,the adhesive is very sticky and the plastic is very hard to rip.3.Water & Tear Resistance - Superior side seams combined with Heavy Duty polyethylene make these High Quality envelopes highly resistant to water, punctures, and tears.4.The mailers are opaque. convenient for protect your privacy. prevents theft and provides extra protection during the shipping process.