Shockwave S5 Sentinel Marine Suspension Module — Pump IncludedExperience unmatched on water comfort with the Shockwave S5 Sentinel, a premium marine suspension module engineered to deliver a smoother, safer ride in all conditions. Designed and manufactured in Canada, the S5 absorbs wave impact to protect your body from the harsh vertical forces that cause fatigue and long term back strain. Whether youre cruising, fishing, or running long distances, the S5 helps you stay out longer with less effort and greater