Cotton, Linen, or Silk?
Cotton woven wrap conversions are excellent for all ages although a heavier gsm can provide more cushiness for a toddler. 

Linen and silk  are also great choices for both babies and toddlers, although linen can get a little diggy for heavy toddlers (but using a heavier weight of linen or a double layer of a thin linen works great). 

Linen is stronger and tougher than cotton, owing to the parallel arrangement of its fibres.  Silk is also a strong natural fibre and is simply beautiful.  Linen and silk are especially good in a double layer or an extra wide width.  I found single layer slings in linen or linen blend (regular width) supportive for my toddler until she was around two. If you choose this style you will get a lot of use out of it. A double layer of silk is probably one of the most supportive fabric combinations although some people find them hot at the height of summer.

Hot Weather?
Linen is highly recommended for hot weather babywearing. Linen both absorbs and loses moisture rapidly, and can absorb quite a bit of moisture initially without feeling damp. This helps to keep you and your baby cool.

Fabric Care?
All types of fabric I use are generally easily washable which is very important for anything around babies! Fabric care for cotton and linen blend slings is very easy.  Simply wash on a gentle cycle on cold in a laundry bag and hang to dry.  Linen and blends should only be washed with a liquid detergent. The addition of cotton to linen makes the fabric soft and they are not as prone to wrinkling as pure linen. Pure linen is great though.  It wrinkles fairly easily but is a little more supportive which is a plus.  To counter the wrinkles I iron my sling after every wash and hang on a hook when not in use - which keeps it fairly wrinkle free.  Linen can feel a little stiffer/rougher when brand new but softens quickly with use and washing. The easiest way to care for silk is with spot cleaning (with a damp cloth) and occasional hand washing.  Silk may also be dry cleaned.  Machine washing on a gentle cycle is also possible but the silk will lose some of its sheen.

Wrap Conversions?
And lastly there are wrap conversions.  This fabric is especially woven for babywearing, are generally thicker than other fabrics, and have just the right amount of give, so the fabric feels more cushy on your shoulder.  Wrap conversions are fantastic for heavy babies and toddlers.  There are many choices from cotton to cotton blends and more and are generally easy to care for.

If you would like any other information on the fabrics I use. Please feel free to ask.