SJ Foam Adventure Winter uses a dual-layer construction of open-cell (reticulated) recycled PU foam with different densities, just like the original version. But in this winter edition, the breathable top layer is replaced by a felt wool top layer for extra warmth and softness. In addition, an aluminium layer is added under the forefoot that acts as a cold barrier. Thanks to these upgrades, the SJ Foam Adventure Winter footbed delivers advanced thermal protection, all-day cushioning and odour control.