The Prolimit Raider unisex boot is the most universal boot. The glued and blind-stitched seams keep the water from getting in and the 5.0Mm neoprene makes sure your feet stay warm. The reinforced heel panels make sure you have the stability and support that you need during your session on the water. The difference between the rt and st is that this boot has an internal split toe, the split toe allows you to have more balance and control.