Background: Flip-Flops become increasingly popular. However there is a lack of recent studies that show the effects of that footwear on gait as well as on lower limb biomechan-ics. Objective: The aim of the present study is to realize differences of qualitative and quantitative gait parameters between walking in Flip-Flops and barefoot walking in young and healthy adults. Methods: Six subjects (three men, three women) at the age of 22 (±4 SD) underwent gait analyses. Selected outcome measures were stride length, cadence and gait velocity. For the determination of mechanical leg axis changes at the angles of ankle, knee and hip joint were measured. A video-based data-acquisition with three Nikon coolpix p500 was used. Subsequently, kinematics and stride length were determined with the computer programme ScreenScales. Statistical significance was examined with the Wilcoxon-Test and the comparison of mean values. Results: The wearing of Flip-Flops resulted in a significant larger step length and a larger ankle angle at the end of mid stance compared with that of barefoot walking. Furthermore five of six subjects walked slower with Flip-Flops as bare-footed and their cadence was reduced. Conclusion: Effects of Flip-Flops on qualitative and quantitative gait parameters could be shown. Because of the small sample size, the results need to be considered critically, though. Moreover, no long term effects were regarded.