I have FINALLY found the perfect light-weight cross-trainer with great stability. I work out at home and do a lot of "boot camp" programs involving jumping, lateral moves, and such. I tried and sent back four other pairs of cross-trainers before finding and ordering these. Love how lightweight and breathable they are so my feet stay cool, and I don't feel like I have bricks on my feet weighing me down when jumping. Yet they have fantastic stability in the sides to support and prevent rolling during my moves. Stability is critical for me in a shoe as I experienced a severe ankle sprain last year that took 6 months to recover from, and I need the support to prevent future injury. Note the TR in the name as this indicates it has more stability for cross-training. There are other Gel-Blur33 shoes that don't have this designation and don't have the same level of support and stability in the shoe as they are running shoes versus cross-trainers. I found these to be very true to size. I wear a size 8 in regular sandals and heels and ordered the same size in these trainers. I highly recommend this shoe.