I wore them while using a boogie board and swimming in the ocean, as well as in the pool and hot tub. Order half size larger than you regular size = perfect fit, beyond comfortableHOWEVERI ordered the Beige Pu, and it is an ugly brown. Save yourself a lot of trouble and DO NOT purchase this item! Theyre not super thick wood, so not all that sturdy. Ive used Johnsons Baby Cotton Buds for something like 30 years or more now, and Ill stick with them forever I think as the quality is always fantastic. This is a fundamental quality issue on behalf of Acorn, and Amazon was unable to provide a workable solution to resolve this for us. Would definitely recommend them ???? It never left a blister though, and its stretched out enough now that theres no pain while wearing them. Its my second time wearing them and I just like the fit I wear a size 10. I paired these up with the Heka rails for Mitsubishi RVR.