[, STURDY, TEAR-] Our mushroom grow bags are crafted from high-quality 6- thick polypropylene, known for its non-melting, non-breaking, tear-, and long-lasting properties. [LARGE-SIZED TRANSPARENT MUSHROOM SPAWN BAGS] These mushroom grow bags offer ample space to mushrooms have enough room to grow. Measuring 8 inches in length, 5 inches in width, and 20 inches in height, they can accommodate 3 to 4.5 pounds of substrate, providing an Perfect environment for mushroom growth, spawning, colonization, and fruiting. [HIGH TEMPERATURE AND PRESSURE RESISTANCE] You can heat cooking the spawn bags prepared with mushroom substrate in a pressure cooker. These mushroom grow bags can withstand temperatures of up to 399°F (126°C) without melting or breaking. [EXCELLENT FILTRATION CAPABILITY] These mushroom spawn bags feature a 0.2-Micrometre breathable filter patch that effectively prevents impurities from entering the interior of the mushroom grow bag. Additionally, it facilitates gas exchange, crucial for mushroom respiration and metabolism, promoting their healthy growth. [WIDE RANGE OF APPLICATIONS] These mushroom grow bags are a cost-effective choice for growing mushrooms. You receive spawn bags that can be used for a variety of mushrooms, such as oyster mushrooms, shiitake mushrooms, reishi mushrooms.