BIAB Medium Filter Bag with Drawstring

Medium Filter Bag with Drawstring

This medium-size filter bag from Dark Rock Brewing is built for containers up to ~28?cm in width and ~22?cm deep.

It’s perfect for brewing (BIAB) or for straining fruit and pulp.

Made from food-grade mesh cloth, it’s reusable, durable, and easy to clean.

The drawstring closure ensures it stays secured during mash or steeping phases.

Use it in all-grain, partial mash, or for fruit wine / cider straining. It helps reduce clean up and grain loss.

Specifications

• Max container width: ~28?cm
• Depth: ~22?cm
• Material: Fine food-grade mesh (polyester or similar)
• Closure: Drawstring with lock
• Use case: Grain mashing, fruit straining, adjunct soak

Usage Tips

Secure the drawstring around the rim of your pot or fermenter to prevent slippage.

When lifting from liquid, let it drip before squeezing gently for extra wort.

Rinse immediately post?use and hang to dry to avoid mildew, mould, or lingering sugars.

Avoid folding when wet to minimize creases.

Applications

• Medium BIAB batches: Works well for ~10?L or mid-size systems
• Fruit wine / cider: Strains pulp, skins, seeds cleanly
• Small extract/partial mash setups: Holds grains or specialty additions
• Recipe testing / pilot batches: Allows cleaning and reuse across sessions

Benefits

Compared to loose grain setups or rigid filters, this bag reduces mess, eases transfer, and captures fine solids.

The drawstring gives you control while retaining flexibility in kettle size.

Brewer’s Tip

To speed draining, suspend the bag over a colander or mesh rack so air flows underneath.

Use gentle back?rinsing instead of harsh squeezing to protect the mesh.

If mash viscosity is high (e.g. high rye or wheat), sprinkle rice husks or adjust crush to assist flow.

This bag handles moderate duty well.