I bought a spare "lace" and replacement kit to carry with me. If it brakes, it is covered under warranty, but at least now I don't have to wait for a new lace. I don't think any other shoe manufacturer warrants their laces.
Warranty Page
Boa provides replaceable parts at no charge for the life of the product in which we are integrated. In order to support the continuing improvement of Boa products and the products of the Brands we work with we need the following information in order to provide your parts at no charge. This will also be used as shipping information to get you the parts you need.