Columbia Women's Drainmaker II Water Shoes Grill/Afterglow With bigger, more numerous drainage ports in the heel and forefoot, the updated Drainmaker II drains water 33% faster than its predecessor. Add siped lugs for increased traction on wet surfaces and new internal frame support and you’ve got an ideal lightweight, quick-drying shoe for staying safe and comfortable during extended waterside activities. Techlite midsole with drainage ports in heel and forefoot. Omni-Grip high traction wet rubber grip. Breathable single layer open mesh upper