Crocs? Alice Work Shoe Details: Designed to meet workplace standards with a closed heel. Crocs Lock? tread provides slip-resistance that exceeds industry standards. Croslite? material footbed relieves pressure on feet, legs and back, and also includes circulation nubs to increase blood flow. Whole Sizes: 4-11. Massage-pod footbed feels good. Enhanced arch support. Easy to clean with soap and water. All Crocs? shoes are uniquely designed and manufactured using Crocs' proprietary closed-cell resin, Croslite? The Croslite? technology gives each pair of shoes the soft, comfortable, lightweight, non-marking and odor-resistant qualities that Crocs wearers know and love.