This packaging bag is made of PE, the adhesive on the fold-over flap is strong enough and goes end-to-end. There’s no need for reinforcement tape, and it doesn’t come apart unless you tear it up. Peel and stick lip provides a secure, tamper-evident closure. This mailer bags are useful for soft items, such like T-shirts, blankets, scarves, or other non breakable items. Price over 5000 pcs based on the sea freight.