Trainers from Swissies. Exteriro of synthetic. Two velcro straps over the foot. Inner of mesh. Sandal from Swissies. Exterior of synthetic. Two velcro straps over the foot. Inner of mesh. Light & soft shoe with 50% air in the sole for better walking & standing. Gives the impression of walking barefoot, which gives better posture & health, a pressure over the whole foot & not only the front & rear. Recommended by doctors & orthopedics. Rubber sole.