SIDI-DESIGN-SERIES-S-D-S-is-a-collection-of-products-that-are-designed-by-Sidi-8217-s-engineering-design-team-but-are-produced-by-outside-suppliers-Sidi-prefers-to-keep-it-very-clear-as-to-what-items-are-manufactured-at-its-own-factories-&-what-items-are-sourced-to-outside-suppliers-In-this-way-the-integrity-&-value-on-the-Sidi-br&-is-maintained-for-all-its-clients-&-rider-8217-s-while-at-the-same-time-providing-the-market-some-interesting-new-products-from-the-new-SIDI-DESIGN-SERIES-brand