Cold water anglers often use chest high boots, known as waders, to wade into the water. In some areas, wading can be done in wading shoes and rubber booties.”Stocking foot” waders have neoprene “feet” and are designed to be worn inside felt-soled boots or other types of soled boots. These so-called “wading boots” or “wading shoes” provide excellent grip on slippery, rocky riverbeds. Neoprene waders provide insulation against the cold, provide padding in case of a fall, and resist puncture and abrasion when walking through streamside brush. Breathable Gore-Tex waders provide ventilation when hiking along the water, but do not provide flotation in the event of slipping or falling into deep water. In deep water streams, an inflatable personal flotation device (PFD), or a Type III Kayak fly fishing vest, adds a degree of safety.