Mylar bags (polyester film + aluminum lining) are a lightweight, cost-effective, and highly protective option for flower, pre-rolls, edibles, and concentrates. Why Use Mylar Bags for Cannabis? ✅ Superior Freshness – Blocks oxygen, moisture, and UV light (extends shelf life). ✅ Custom Branding – Full-color digital printing for eye-catching designs. ✅ Child-Resistant (CR) Options – Compliant with ASTM/ISO standards. ✅ Versatile Sizing – From 1g pre-roll sleeves to 28oz bulk flower bags.