The phrase "cotton sling" refers to a soft fabric material made from cotton that is used to support and carry something, like a person's arm or a baby. Full definition
Mayarya by Amoralia Exclusive Cupcake Maternity and Nursing Bra Award - winning soft cotton lined lace maternity and nursing braCotton lining & covered seams offer total comfort for sensitive skin & chapped nipples Half - moon cotton sling to support whilst breastfeeding Plastic clips open one - handed Silky soft... (mayarya.com)
ZoloWear pleated cotton baby slings feature the same superior quality of stretch cotton that the original ZoloWear cotton slings feature, boasting 7 1/2 oz. (zolowear.com)
I tried an unpadded cotton sling once, and it kept slipping out of the rings. (zolowear.com)