This ring sling is designed for tandem wearing. It consists of one pair of sling rings and two identical slings. Can be used from birth. The maximum weight of both children is 60 pounds (27 kg). Provides an ergonomic M-position seat for baby's development. The length of each line is about 80 inches (2 meters). One size fits most S-XXL. Material 50% linen, 50% cotton. Solid aluminum sling rings. Matte silver color. Wash cold on delicate, hang dry only. The kit includes instructions for use. Ukrainian quality certificate 05.03.02-04 / 22483 from 06.30.16. Please note that the package will be sent from Ukraine. The return of the parcel is also made to Ukraine at the expense of the buyer.