FLEXIABLE- Chest/Shoulder Flex Panels and Smooth Side Panels for great mobility CUSTOM FIT- Tapered waist for an accommodating feel with oversized armopening for superior mobility SPLIT CONSTRUCTION for COMFORT- Double split back panel for a more accommodating fit secure fit- Zip closure and 2 concealed, adjustable belts for APPROVED FOR USA & CANADA- Harmonized U.S. Coast Guard & Transport Canada Approved Level 70.