The Sprint Aquatics run small; to wear over socks you need to order a size larger.

I use them only for going in and out of the tent at night, and only because my hiking shoes tear up the ground outside the tent door. That's the only reason I even take them--my trail runners are so comfortable I don't need camp shoes otherwise.

My next trip, I get to try out my new Goose Feet with the waterproof over-booties!