Specification for Microfiber Cleaning Cloths

If you have one or two that you like, ask the maker(s) to send you sample specifications. You might find a site that reviews various makes and get a few names.

That way, you can make sure that you specify something that can be delivered.

Good luck.

Nonwoven disposable wiper
Patent #: 4298649
Issued on: 11/03/1981
Inventor: Meitner

Composite fiber
Patent #: 4460649
Issued on: 07/17/1984
Inventor: Park , et al.

Fabric composed of bundles of superfine filaments
Patent #: 4496619
Issued on: 01/29/1985
Inventor: Okamoto

Very fine denier synthetic fibers
Patent #: 4497868
Issued on: 02/05/1985
Inventor: Reinehr , et al.

Ultrafine sheath-core composite fibers and composite sheets made thereof
Patent #: 4557972
Issued on: 12/10/1985
Inventor: Okamoto , et al.

Elastomeric polyether block amide nonwoven web
Patent #: 4724184
Issued on: 02/09/1988
Inventor: Killian , et al.

Microfiber-containing absorbent structures and absorbent articles
Patent #: 4923454
Issued on: 05/08/1990
Inventor: Seymour, et al.

Process for preparing partially dissolvable and splittable conjugated microfiber
Patent #: 5047189
Issued on: 09/10/1991
Inventor: Lin

Composite fiber and process for producing the same
Patent #: 5059482
Issued on: 10/22/1991
Inventor: Kawamoto, et al.

Modulus nonwoven webs based on multi-layer blown microfibers

#1 sounds like the easiest thing to do if you have no idea how to go about this.

You might get some ideas from the above.