Combed 20s cotton fabric has a t-shirt material grammage of 180 220 gr/m2 for the Single Knitt type of knitting. The 20s material is the most popular material among other Combed Cotton materials, even among all existing t-shirt materials. Combed cotton fabric is usually offered by t-shirt convection as a favorite choice because sellers of this type of material are found everywhere. Especially now that there are more and more 20s plain t-shirt manufacturers that make it easier for convection and screen printing vendors to produce. 2. Combed Cotton 24s For the Combed 24 material with 's' knitting, the usual gramasi shirt material used ranges from 170 210 gr/m2. Combed 24s material. Combed 24s cotton fabric is the most sought after material because of its thickness which is in the middle. The character of this material is not too thick and not too thin. So that convection and t-shirt screen printing vendors return to using 20s because of their availability. Combed 24s is also often relied on by several clothing lines 3. Cotton Combed 30s This is the favorite material for young people in urban areas. This material is usually relied on by clothing lines and distributions because it is thin and not hot. Combed 30s material uses gramation ranging from 140 160 gr/m2 with Single Knitt knitting type.