The 686 Smarty Line of pants all feature 686's famous removable liner. 686 added this liner to meet a basic need of snowboarders. The need to layer. The 686 Smarty Original Pant started it all with a novel idea of adding a removable liner to a pair of snowboard pants. Smarty Pants can easily handle any weather condition you throw at it. Find huge selection of 686 Pants here at Eternal.