2023 Ion Booster X Side Zip Vest

The 2023 Ion Booster X Side Zip Vest is a 50N-rated buoyancy vest built for kiteboarding, windsurfing, wing foiling, and stand-up paddleboarding. Manufactured by Ion, a Germany-based watersports brand that has been producing safety gear since 2011, the Booster X sits in the upper tier of Ion's flotation vest range. It uses a side-zip entry system and a higher-cut silhouette specifically shaped to clear both waist and seat harnesses, so the vest doesn't ride up over a spreader bar or interfere with a harness hook during active sessions.

The vest is certified under ISO 12402-5 and meets CE safety requirements per PPD89/686/EEC, providing genuine 50N flotation rather than impact-only protection. A dedicated loop routes over the harness hook to lock the vest in place, while elastic shoulder straps and side compression straps let riders dial in the fit across a range of body shapes. Additional features include a zippered front pocket, mesh side pockets, front and rear attachment points for a hydration bladder and drinking tube, and reflective panels for on-water visibility.

• Buoyancy rating: 50N (ISO 12402-5 certified)
• Certification: CE approved per PPD89/686/EEC
• Material: 80% neoprene, 20% polyamide
• Closure: Side zip
• Available sizes: X-Small through XXX-Large (unisex)
• Available colors: Black, Blue, Lime, Seaweed
• SKU: 48222-4162

The Booster X Side Zip Vest suits intermediate to advanced riders who already wear a harness and need flotation that stays out of the way. Its higher cut and harness-hook loop are purpose-built for kiteboarders and wing foilers who want buoyancy without sacrificing freedom of movement or bar control. The hydration-bladder mounting points also make it practical for downwinders and longer-distance sessions where carrying water on-body is a real advantage.

Beginners who aren't yet using a harness can still benefit from the 50N flotation, though Ion's standard Booster 50N vest—available in both front-zip and side-zip versions—may be a simpler, lower-cost option for riders who don't need the extra pockets and hydration routing.

Within Ion's protection range, the Booster X Side Zip is the feature-loaded step up from the standard Booster 50N vest. Both share the same 50N buoyancy rating, neoprene-and-polyamide construction, and CE certification, but the Booster X adds the harness-compatible high cut, storage pockets, hydration attachment points, and reflective panels. The standard Booster 50N Front Zip retails slightly higher at $119.99–$129.99 on Ion's own site, while the 2023 Booster X Side Zip is available at retailers like Green Hat Kiteboarding for $109.99—making it a competitive value given its additional features.

Riders cross-shopping from other brands will find the Booster X comparable to the Mystic Star Impact Vest or the Ride Engine Swell Series vest, both of which target harness-wearing riders who want buoyancy and impact protection in a single layer. The Ion's side-zip entry and dedicated harness-hook loop are its most distinctive design details in that competitive set.