I am not a fan of the synthetic material tetron though many who practice Iaido in Japan wear it. I prefer cotton. In that respect, not all cotton keiko gi are the same. Some are quite rough and stiff, while others that are quite expensive drape on you in a very clingy way make them too warm and quite icky feeling. My favorite has been an inexpensive Fuji brand that I get from BoguBag.com. With the weak dollar, the 60$ price may be going up but still worth it. http://bogubag.com/Uniforms/Kendo/uniforms_kendo_gi.html
Kendo Keiko Gi, Fuji Brand, Thick Single Weave, Blue, Indigo Dyed Cotton:
17-306 Keiko Gi, soft single weave, Blue
