These are sturdy nylon bags that stand up to harsh detergents and can be machine washed, boiled or soaked in meta-bisulfite solution to sterilize them. The sewn edges are double lock-stitched to stand up to pressure and they can be used over and over again.
I could just as easily be selling the bags with elastic at the top but I don’t because they are not what skilled brewers prefer. The elastic discolors or wears out before your bag does and you end up cutting it off anyway. Besides there is a possibility that the rubber elastic may impart a ‘burnt rubber’ taste to your brew.
In a typical small brewing operation you would make a Cluett string to hold the bag tightly and securely onto the primary bucket. Gently pour your hot boiled wort through the bag into the bucket. You then carefully remove the bag containing the trub and cap your bucket with an airlock.
These bags also work great for cheese or jelly. This is a 5 gallon bag but the top is a generous 40″ in circumference and will fit any beer or wine primary 2 to 7.5 gallons. The bag is 21″ deep and sits flat in a 5 gal bucket or sits up 3″ in a 6.5 with rim overlap as shown above. Laying flat they are 21″ deep and measure 20″ across at the top and 10″ across at the bottom. We recommend that you carefully cut off the printed portion of the tag prior to use. These are the best bags I have ever used and will be happy to answer any questions you may have.