I see no one replied to you. Hope this is not too late.
Indios vary A LOT in terms of thickness, support, etc... I would suggest you get its official name and go to tbw (www.thebabywearer.com) to see a review of it.
Indios are a bit prone to pulls. Not a huge deal, but makes them slightly less durable to some people.
A cotton indio is definitely safe and can last through toddlerhood. They are very well made wraps. If you are getting a great deal - you cannot really go wrong :)
I second thePP's comments. That being said I LOVE my 100% cotton wrappers paradise 2012 shorty. Love love love. And I am about to purchase a natural hemp indio. :)
My only wrap is a Jacquard Didymos. 60% Organic Cotton and 40% Tussah Silk and I absolutely love it. (it's here: http://www.wrappedbaby.com/index.php?_a=viewProd&productId=59 )
It's light, it's not too hot in the summer. The only downside is that, because of the silk, I don't put it in the dryer and I can't put it in bright sunlight either.
Maybe this website can help you make your decision. It was very helpful for me: http://www.birdiesroom.com/c-396-choosing-a-didymos.aspx
Over the years I have had quite a few Didy's now I only have a Yew which is a beautiful green cotton and linen blend. It started out a bit stiff but now it is floppy and buttery smooth. Out of the blends I've had linen is my favorite but I also love wool blends in the winter. I second the pp that recomended checking out the baby wearer... My habit started on there, lol.
As I said, I never tried the linen, so I can't compare with the silk/cotton I have. Perhaps you can contact an online store (in Canada, we have Birdie's Room) and they can tell you the differences between the two fabrics?
(Meanwhile, I bought a Didymos 100% cotton that I haven't used yet, but it's much heavier and warmer than my silk/cotton one !)
I have had several indios- they are really my favorite wrap. What will make a big difference is the weight of the fabric. Indios can be super-thin (autumn blue) to really thick closing in on 300g/m2. I had a linen mermaid indio that was a great summer wrap, and a dyed NSI that was also quite light and airy.
Really, you need to look at whether you prefer a thicker or thinner wrap for wrapping qualities, and make some decisions from there.
Also, fwiw, my cotton indio was my workhorse wrap- I used it with big and little babies, even though it was a thin wrap.
FWIW is for what it is worth, and NSI is Natural Silk Indio.
Here is the weight I found for this wrap
100% organic cotton and weighs in at around 210g/m2
That would make it a medium-thin weight to me. It will fluff when you wash it, but I think it is a great weight. :)
I love silk, but I like it in a bigger wrap stash because laundering it can be more time consuming (though not by much.) If I wanted to limit my wrap purchases to just a very small selection, I would stick with cotton, cotton/linen/and cotton/hemp blends.