Sided Protection: 1/2 fins on sides of bag help absorb shock and protect enclosed product. High slip lining: Allows easier product insertion and extraction, increasing productivity. Lightweight to Save on postage. Self-Sealing (just peel-n-seal). keeps contents secure and tamper -evident and easy to use. Extra Tough Bubble Inside. Fully laminated Kraft/bubble combination: Stronger construction provides rugged durability and increased bag strength.