Wool is a natural fiber coming mainly from sheep, but also from other animals like alpaca and goat. Wool have great insulation properties and is commonly used in clothes and fabrics intended for cold weather. Due to animal welfare, wool should be mulesing free and certified by a third party. Not common in packaging, but found in bottle sleeves and envelopes.
Use: Clothing for cold weather, insulation and bags.
End of life (producer claim): Pure material is recyclable in closed loop.