Hot. Crossed. Fun. Our new SLING sandal is a flip flop with a twist. With an ergonomically designed open fit upper that lets toes flex free and our incredible feel-good Microwobbleboard midsole, it"s equal parts groovy and utilitarian.FITFLOPTM - GET A WORKOUT WHILE YOU WALKFitFlopTM footwear is biomechanically engineered to help tone and tighten your leg muscles while you walk. Studies at the Centre for Human Performance at LSBU show that normal walking in FitFlopTM sandals* can help: increase leg and bottom muscle activity (up to 30%)absorb more shock than a normal shoe (up to 22%)help realign ground force reaction closer to your joints (so you feel less ache in your hips and knees)reduce foot pressure FITFLOPTM footwear has the potential to increase muscle activity in terms of duration and workload and instigates a more active foot profile. As such, we recommend that all FITFLOPTM footwear be used progressively to avoid excessive muscle soreness.If you; a) have any health concerns which you suspect may be aggravated by wearing them, b) experience any discomfort as a result of wearing them,and/or c) are pregnant, please consult a medical practitioner before starting or continuing to wearing FitFlopTM footwear. *When compared to a control shoe. Case studies were performed on Microwobbleboard technology over a forty-eight month period by Dr David Cook, Senior Lecturer in Biomechanics, and Darren James at the Centre for Human Performance at London South Bank University (LSBU).