The Yak Kallista, a great buoyancy aid for kayaking. It's made from soft flexible foam and offers good levels of comfort. The outer shell is made from a material that offers good durability. The Kallista is easy to get on and off due to the front zip. Once the PFD is on the paddler's torso there are three levels of adjustment. There is a 40mm waist belt that offers the majority of the adjustment while the side compression straps and the adjustable shoulders trim the fit perfectly. A small pocket on the front offers limited storage.