The Sibarist B3 Flat Specialty Coffee Filter is a 100% organic paper filter designed for flat bed drippers in the Kalita 185 style, developed in collaboration with 2021 World Brewers Cup Champion Matt Winton. The B3 paper technology combines structural rigidity with controlled low porosity to produce fast, even extractions with sweet, clean results. Filters are sold in packs of 25 sheets and arrive pre-creased for folding.
The B3 Flat filter's shape is engineered to create a brewing bed that promotes high uniformity turbulence and gives water full access to the coffee bed. Because the filter maintains minimal contact with the dripper walls, the coffee bed sits evenly and water moves through it consistently rather than channeling around compressed edges. For brewers chasing repeatability, that even flow path is the difference between a cup that tastes the same every time and one that varies with small changes in technique.
B3 paper is rigid enough to hold its shape during the brew, which keeps the filter from collapsing against the dripper and slowing the draw-down. At the same time, the material's thickness and low porosity act as a fine filter barrier: fines and oils that would otherwise pass through a thinner sheet are held back, producing a cleaner, sweeter cup without sacrificing extraction speed. Most filters trade one quality for the other; the B3 paper's construction delivers both.
B3 Filter Papers are 100% organic, and Sibarist packages them in organic, compostable materials. The filters are manufactured in Barcelona. Each pack of 25 arrives as a flat stack with pre-folded crease marks so no separate folding guide is needed.
| Specification | Detail |
|---|---|
| Filter shape | Flat (for flat bed drippers, Kalita 185 style) |
| Paper material | 100% organic |
| Sheet count per pack | 25 |
| Packaging material | Organic and compostable |
| Origin | Barcelona, Spain |
The Sibarist B3 Flat filter suits home brewers and competition-oriented baristas using a flat bed dripper in the Kalita 185 style who want a fast draw-down, even extraction, and a clean, sweet cup. Brewers who prioritize organic materials and compostable packaging will also find the B3 a good match.
The B3 Flat filter is shaped for flat bed brewers only and is not compatible with cone-shaped drippers such as the V60 or Chemex. It requires a brief folding and rinsing step before each brew; brewers seeking a no-prep, drop-in filter will need a different option.
The Sibarist B3 Flat filter is designed for flat bed drippers in the Kalita 185 style. It is not shaped for cone drippers such as the V60 or Chemex. Brewers should confirm their dripper uses a flat bed before ordering.
Yes. Each B3 Flat filter arrives as a flat sheet with pre-scored crease marks. Before brewing, fold all four edges along the indentation lines, seat the filter in the dripper, and rinse from the center outward with hot water in a circular motion until the filter is fully adhered to the dripper walls with no air gaps.
Rinsing the Sibarist B3 Flat filter ensures the paper adheres fully to the dripper walls, eliminating air channels that would allow water to bypass the coffee bed. Starting at the center and moving outward in a circular motion helps seat the entire surface evenly, which is what gives the B3 its characteristic uniform extraction.
The B3 Flat filter paper is 100% organic. Sibarist also packages the filters in organic, compostable materials, so both the used filter and the packaging can be composted rather than sent to landfill.
Each pack of Sibarist B3 Flat Specialty Coffee Filters contains 25 sheets. The filters are stacked flat and pre-creased, ready to fold before each brew session.
At CoffeeRoast Co., we are passionate about coffee. Every piece from our catalog is designed and rigorously tested to make sure you get perfect and consistent roasts every time.
We’ve partnered with various manufacturers that operate around the globe under a strict set of guidelines both on a local and corporate level so that when you shop with us, you will be able to select from the highest quality coffee roasters and coffee equipment available on the market.
Whether you are a coffee enthusiast or a small business owner, you're sure to find whatever so you have the perfect roast you've been looking for.
Any questions or concerns? Please call us at (312)-298-9262 or email us at support@coffeeroastco.com and a member of our professional support team will be in touch with you as soon as possible.
CoffeeRoast Co. will ship orders as soon as possible in the order they are received. If you purchase multiple items, they will be shipped to you based on lead time and availability. This way you get as much of your order as soon as possible, which means that your order may come in separate packages, especially if you order products from different brands.
We will pay shipping for products returned due to product defect, misrepresentation, or false description. Afterward, we will initiate a full reimbursement should you decline an offer to replace the item with the same item of equal value and assured quality.
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As soon as you place your order with CoffeeRoast Co. you will receive an order confirmation e-mail. This means that your order has been logged in our system and your credit card has been pre-authorized for the purchase. We then work with our partners to confirm and prepare your order for shipment. If any item you order is on backorder or unavailable for whatever reason, we will cancel the credit card authorization and duly inform you via e-mail.
Order Shipment:
Orders are shipped within five business days from the date you place your order unless specified otherwise on the product page. The product page will contain the most accurate estimate on shipping and lead times. Shipping and lead times provided on the product page are our best estimates based various factors including order volume, information from our partners, shipping issues, etc., and may vary due to these factors.
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Damages:
We will take full responsibility for any obvious damage to your product caused by packaging or delivery of an already defective product. Please carefully inspect the packaging of your item(s) when they arrive, if you notice any damage or defects, you should document them when signing for delivery. If the item(s) contained in the package arrives damaged, please send photos to support@coffeeroastco.com, and we will process an insurance claim on your behalf.
Returns and Cancellation Policy:
We back all our products with a customer satisfaction guarantee, so we've created a fair return and cancellation policy.
In most cases, once the order is processed, it is final and not cancellable due to the larger nature of these products. Requests for returns/exchanges after the item has been delivered will be evaluated on a case by case basis. Any return request is subject to an administrative and cancellation fee equal to 10% of your order with a minimum of $35.
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Return or exchanges request submission must be within 14 calendar days upon receipt of shipment unless noted otherwise on the product description page. Your return must be in original packaging and unused.
We encourage using USPS flat-rate shipping in returning products to receive a shipping expense refund. Buyers must ensure all returned parcels delivery receipt AND signature confirmation. We highly recommend insuring your parcel as we cannot issue a refund for an item that we do not receive back should it get lost/damaged during transit.
Refunds:
Should an item be returned because it was defective, misrepresented, not as described, etc., CoffeeRoast Co. will issue a full refund and will reimburse the customer for all shipping expenses associated with the return.
Please allow 5-10 business days from the time the returned item is received to process a refund. Refunds will only be issued to the original form of payment that you used when placing your order.
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