Inside material is not sticky but has no slide to it! I am on my feet all day at work and many times have tears in my eyes. But they seem really short. I usually ordered Saucony and New Balance brands. I really, really, REALLY wish I didn?t buy these. ????????????????????????????????????????????????????????????????????????????????????????? Great sound quality and compatibility with zoom is important. Generally feel fitflop sandal quality has declined. You talked me into it, and I couldnt be happier. Within one week after contacting customer service, I had a new handle delivered to my door and I was not charged, even though it wasnt a manufacturer defect.