Lightweight breathable mesh upper with a stretch air mesh tongue and gusset. Elastic lacing system for easy on/off use, medial water drainage ports and minimally lined with a soft breathable microfiber. Our patented Drop-In Heel® design offers both a shoe or slide functionality. Stretch bootie construction for barefoot wear and medial water drainage ports. Dual-density anatomical PU footbed with a polyurethane gel insert. Soft, quick-drying jersey knit or single layer mesh footbed cover for maximum comfort and breathability. Removable and washable. All-weather, non-marking rubber cupsole with razor siping for traction on wet surfaces.