Kalita KWF Wave Filters 155 The wave design reduces contact between the brewing space and the filter itself for a more balanced extraction and a flavourful, full-bodied cup of coffee every time. The design of the filters works in perfect harmony with Kalita Wave drippers to create a pool of water on top of the coffee bed that can help control agitation, helping maintain a uniform extraction without too much turbulation (which may lead to over extraction). You'll find the Kalita Wave pour over coffee filters used in the world's top specialty cafes and professional coffee-making competitions. But they are also the perfect filters for pour-over beginners. Cone filters require perfect grinds and pouring technique in order to prevent stalling and over-extraction. The wave filter's flat bottom, on the other hand, maintains a wide and even coffee bed, allowing water to permeate and leave the filter evenly. Made in Japan out premium thick paper stock. Kalita Wave 155 filters are oxygen bleached for environmental sustainability and to maintain your coffee's perfect balanced taste. For best results use your Kalita Wave filters with the same size Kalita Wave dripper in either ceramic or stainless steel.