Self Sealing (Just peel-n-seal)– keeps contents secure and tamper -evident and easy to use. Extra Tough Bubble Inside. • Easy to use – Prepare shipments quickly; these mailers are perfect for shipping a wide variety of items. High-slip bubble cushioning allows for easy product insertion and removal. Shipping labels adhere securely to the surface. • Lightweight – Air bubble cushioning along with the polythelene exterior material provide exceptionally light protection. Lower shipping costs combined with faster shipment preparation equals big savings. • Confidential – Completely opaque for content privacy and professional appearance. • Carrier approved – Use for all of your shipments with all carriers including Canada Post, UPS, FedEx, DHL, USPS and more.