M7.5 / W9 (fits true to size) I have worn these twice! I just have a few other pairs that I reach for more. About RAD: The R.A.D® R-1 is tuned for gym, HIIT, and conditioning—making it the workhorse of your gym shoe rotation. Lightweight and breathable. SwellFoam N2 midsole for comfort and performance. Tuned for HIIT and conditioning. Designed with the athlete in mind, it is a lightweight cross-training shoe built to elevate your workouts. Our SwellFoam N2™ midsole delivers responsive energy return for high-intensity movements and speed work. A generous stack height adds cushioning and comfort whilst you’re racking up reps in the gym. The R.A.D® R-1 keeps you moving, free to perform during your gym and conditioning workouts.