Inflatable PFDs are great for boaters who want the protection of a life jacket without the bulk. These lifejackets are not recommended for use on dinghies. Inflatables are available in automatic and manual inflation models. Many styles come equipped with pocketed whistles or beacons, with bright colors to increase visibility. Models with a hydrostatic inflation device will help to prevent accidental inflation in wet weather conditions. Some styles include integral harnesses for attaching a tether directly to the PFD. For severe conditions, optional leg straps are recommended to ensure the jacket stays put and does not ride up when in water.