APF stands for ALL PERSON FIT.  This is the life jacket easliy adjusts from a slim 30" chest to a super-size 56" chest with no sacrifice in comfort. Adjustable neoprene shoulder, cool open sides, reflective tape and hideaway strap pockets. Adjustable front buckle straps can be loosened for quick ventilation. A favroite primary vest or one to share with the whole family at the summer cottage.