Its tough enough for outdoors. I will follow-up after some time. OMG these are so stinking cute! As of now, without the insole, very uncomfortable. =DDas einzige was man villt ein klein wenig bemängeln KÖNNTE, ist das Material/die Stabilität. These sure do slide and hold up really well. Must be completely dark for it to glow a bit. The picture looked better than the actual shoe In recent years [timeframe?] some[who?], but not all, sporting goods manufacturers have begun including this information on their product labels. SO comfortable, and offers me such great support, even my podiatrist was impressed.