I designed the first prototype hardware for the Reima Smart Shout in 2000. It was a communication system intended for snowboarders , and was on the cutting edge of wearable technology at the time. It won an ISPO award back in the day. Nowadays it is technologically outdated; however, the interactions are still quite novel. Aiming to be one of the earliest commercial wearable products, the Smart Shout was a sash enabling voice communication between snowboarders. The role of the prototype was to develop towards a commercial product, a proof of concept. As standard mobile phones at the time were difficult to operate outdoors, due to cold and the need for gloves, a wearable for controlling the phone was created. The user interface consisted of small textile straps that could be pulled with gloves: using them, voice messages could be relayed to others.
(Unfortunately my own pictures of it have faded in time. These have been saved from Reima (l) and Digitoday.fi (r).)
 Mikkonen, J., Vanhala, J., Reho, A., & Impiö, J. (2001). Reima Smart Shout concept and prototype. In Proceedings of the 5th IEEE international Symposium on Wearable Computers 08-09 October 2001 (pp. 174 – 175). ISWC. IEEE Computer Society, Washington, DC, 174