andres m hi , this can be use with a boot ?? my girl feet is woman 9
MARCO W Depends a little on the width of the foot. A somewhat narrow foot will do with a boot, a wider foot with a sock or even barefoot. They are somewhat rough on the feet without anything, so a sock or boot will do well.
ROBERT L I use them with bare feet or liner/socks. The boot is smaller than another pair of fins my wife uses, but should be able to handle a thin boot. Might be tight for a full boot with a sole.