These premium lightweight Jiffy Mailmiser bags feature a strong Kraft paper outer with a bubble film lining to protect delicate or fragile items in transit. Extra strong side welds and a convenient self-seal closure provide superior protection in transit; ideal for heavy duty domestic and overseas mailing. These white size 4 mailers measure 240 x 320mm. This pack contains 50 white mailers. The bubble that inner lines the mailers is produced using a minimum of 30% recycled content.