Jenna R.wrote a review of NRS Zephyr Self-Inflating Personal Flotation Device on October 25, 2015
Familiarity: I've used it several times
Easy to put on, wear, and transport. The waist format is convenient for SUPing and for soaking up the feel of the sun.. Doesn't get in your way while paddling. Its light so you don't feel overloaded. You may have to swivel it, sometimes wearing it with bag in front if you do a maneuvering on your board (like sit ups, naps on your back, yoga etc.). Sit up on my board are the only time it gets in the way. Best option for a non intrusive device that still meets safety regulations for the water. Good $$ too.