Thule Chariot Cross 2 (double)

Designed as a do-everything sport stroller.  Take your kids biking, hiking, strolling and skiing.  The Chariot Cross 2 holds two children (up to 45kg total weight) and folds up to fit in your trunk.  It includes the stroller wheels and bicycle trailer kit, but you can get numerous accessories to upgrade your stroller (such as the ski and hike kit).  The large cargo space can be stored away when jogging for an increased stride, each seat reclines independently, and the suspension is adjustable.  The seats are removable and easy to clean.  This stroller along with the ski kit (sold separately) is the best system we have found to cross country ski with your young ones.