Autoclavable BioDegradeable Gusseted Bags - Type 3B

Professional Mushroom Cultivation Bags for Sterilized Substrates

Designed for mushroom cultivation, these Type 3B gusseted grow bags are made from 2.2 mil polypropylene and can withstand the high temperatures required for sterilizing mushroom substrates.

The built-in 5-micron filter patch allows gas exchange during colonization while helping protect the substrate from airborne contaminants.

Their gusseted design expands as the bag is filled, making them ideal for preparing blocks of supplemented sawdust, grain, and other sterilized mushroom substrates.

🍄 Great For

• Sterilized supplemented sawdust
• Mushroom fruiting blocks
• Grain spawn
• Hardwood-based substrates
• Indoor mushroom cultivation
• Home and commercial mushroom farms

🔬 Built-In Filter Patch

Each bag includes a 1.5" × 1.5" filter patch with 5-micron filtration.

The filter allows the growing mycelium to breathe while the bag remains closed during colonization.

♨️ Autoclavable

These polypropylene bags are designed for sterilization, making them suitable for use in an autoclave or pressure sterilizer when preparing mushroom substrates.

After sterilization, allow the substrate to cool completely before inoculating.

🌱 Biodegradable Design

These bags are designed to provide the durability needed during mushroom cultivation while offering a biodegradable alternative to conventional mushroom grow bags.

📦 What's Included

20 Type 3B Gusseted Bags

Bag Specifications:

• Size: 8" × 5" × 19"
• Material: 2.2 mil polypropylene
• Filter size: 1.5" × 1.5"
• Filter rating: 5 micron
• Hole: L
• Quantity: 20 bags

⚠️ Sterile Technique Required

After sterilization, bags should be handled and inoculated using appropriate clean or sterile technique. The filter helps protect the substrate during colonization, but it does not eliminate the need for proper laboratory practices.