1. Food grade, BAP free 2. Unique channel design 3. Can be frozen, refrigerated and microwaved 4. Keep foods fresh 5X long 2013 Factory Offer Low-price Vacuum BagsProduct information MaterialsNylon (PA) + PE ThicknessStandard: smooth side 75 micra, channel side 90 micra, total 165 micraSpecial 1: both side 90 micra, total 180 micraSpecial 2: both side 100 micra, total 200 micraSpecial 3: we can ...