Pease help if you can.

I have a Meh Tai Baby Sling - made or distributed by the Nursing Mothers Association. This sling would be over 10 years old, maybe even 15. It was given to me by my sister and I'm just wondering if anyone knows how long I can use it for.

The style of it is just a square of fabric with straps coming from all 4 corners.

I used to use it when MJ was real young but just wondering if its still suitable to use now?