The Khimera Dual Flotation PFD offers 20.5 lbs of buoyancy (7.5 lbs of foam keep most bodies neutrally buoyant, 13 lbs additional buoyancy available when cells inflated via CO2 cylinder). Designed for paddling, it features wide arm slots.
There’s also a military version called the Rescue Swimmer Vest which incorporates PALs webbing and offers 9 lbs of inherent foam buoyancy, 26 lbs total buoyancy when manually inflated with CO2.