Premium Food-Safe & Durable Material: Crafted from BPA-free, food-grade materials, these reusable vacuum sealer bags are suitable for freezing, microwave heating, sous-vide cooking, and daily food storage. The reinforced construction provides enhanced strength that resists tearing and puncture from sharp items. Upgraded Fully-Submersible Air Valve: A silicone air valve design ensures strong airtight performance and allows complete submersion during sous-vide cooking. The valve is detachable for straightforward cleaning and reuse. Reusable, Resealable & Easy to Use: Featuring a double-zipper closure, the bags can be securely sealed with an included zipper clip and re-vacuumed after each use. Compatible with Most Vacuum Sealers: This set includes 30 reusable vacuum sealer bags in three sizes: 8.5"×8.5", 11"×10", and 13"×10.8". The bags have a standard valve caliber compatible with most handheld vacuum pumps and traditional countertop vacuum sealer machines, ensuring broad compatibility. Multi-Purpose Storage for Extended Freshness: An embossed channel design improves suction efficiency to remove excess air, helping to keep food fresh longer. Ideal for preserving a variety of foods and organizing meal portions, snacks, and travel items. Food-Grade Materials