Your lower back comfort is important on a dive. When you're more comfortable you get better air consumption. Better air consumption means longer and more fun diving. If you beach dive this can mean the difference between wanting to make a second dive or calling ita day due to back pain from carrying the heavy cylinder across the beach on your back. Make you diving day more enjoyable with this heavily padded Lumbar Pad. Remember the golden rule in diving:"Comfort and Fit"