https://www.reddit.com/r/AndroidWear/comments/4d8uzc/magnetic_leather_somebody_finally_decided_to_make/

Search amazon or ebay for "magentic leather band galaxy gear S2". I ended up buying on ebay first, but they screwed up my order so I went to amazon

http://www.amazon.com/Smartwatch-Pandawell-Adjustable-Magnetic-Replacement/dp/B01CUFVFNI/ref=sr_1_1?ie=UTF8&qid=1459912930&sr=8-1&keywords=magnetic+leather+band+galaxy+gear+s2