Rock N Sports Extra Large Snorkeling Vest: XL Inflatable Horsecollar Float for Larger Adults Inflatable vest provides extra buoyancy while snorkeling. This version is especially sized for larger adults! Oral inflation tube allows quick inflation. Over-the neck horsecollar style with waist and crotch straps. Vest dimensions: Overall height: 26 inches Overall width: 20 inches Head opening: 10 inches tall, 8 inches wide