What is the fine-grained topic of the following text: Here at Brodie Cashmere, we source all of our cashmere from Outer Mongolia, where our own little herd of hardy cashmere goats endures the lowest temperatures so they can grow a lovely soft undercoat – the very same that helps to make all of our hand-crafted and hand-finished products. Only return the topic.
Sourcing of cashmere for Brodie Cashmere's products