Reply To: Tallis Katan – wool vs. cotton Home › Forums › Decaffeinated Coffee › Tallis Katan – wool vs. cotton › Reply To: Tallis Katan – wool vs. cotton May 15, 2016 4:32 pm at 4:32 pm #1152067 charliehallParticipant Wool. Except when it is REALLY hot. Then I use polyester mesh.