Cloud Trainers by On Running Born in the Swiss Alps, On set out in 2010 with a big ambition: to revolutionize the sensation of running. On’s radically different CloudTec® technology delivers soft landings followed by explosive take-offs, otherwise known as running on clouds. Today, On is the fastest-growing running brand in the world. And there’s no sign of slowing down. This iteration comes in a shark pebble.  - Please note: This model runs small. We recommend taking the next size up. - Total recycled content: 5% Recycled - Polyester: about 30% recycled