Auto Inflation. With Harness. Buoyancy : Rated 150 N, actual buoyancy 165 N (33 g CO2 gas bottle). Ergonomic shape : short on chest and cutaway sides, rounded neck for superior comfort. Hardwearing andflexible outer shell with reflective piping. Visibility of inflated jacket : yellow air chamber +300 cm² retro-reflecting tapes. Backstrap, 40 mm polypropylene : ensures perfect body fit when lifejacket is inflated. NO Crotch strap.