O'Brien Arsenal Paddle Life Jacket Life Jacket Size:XS/SM The main difference is that

The main difference is that the hard plastic on the sides is much longer which moves the toe strap further from the handle making it ideal for your back toe holds and back deep starts

HyperCush Insole

or world class boat manufacturers like Nautique

The Honeycomb floor also doubles as full-length chassis water drainage system

Not for the faint of heart

O'Brien Arsenal Paddle Life Jacket Life Jacket Size:XS/SM The main difference is thatFeatures Ideal for Stand Up Paddleboarding, Kayaking and other paddle sports Vest Type lll PFD Zip Front Adjustable shoulder and side straps Color: Black Green Harmonized U. S. Coast Guard & Transport Canada Approved Jacket Sizing (Chest Circumference) XS SM (28" 36") MD LG (36" 44") XL XXL (44" 56")