Best Open Water Safety Buoys for Triathletes: Top Swim Tow Floats
What to Look For
An open water swim buoy is a non-negotiable piece of safety kit for every triathlete training in lakes, rivers, or the sea. They make you visible to boat traffic, provide a rest platform if you need a break, and can double as a dry bag for keys, phone, or nutrition on longer swims. As the UK open water season approaches, now is the time to get one.
Key Features to Consider
- High visibility colour — Bright orange, pink, or yellow are the most visible in all water and weather conditions. This is the primary function of a buoy, so do not compromise on colour.
- Dry storage capacity — A 15–20 litre buoy provides enough dry storage for a phone, keys, snack, and a small towel. Essential for longer training swims.
- Tow resistance — The best buoys sit directly behind you with minimal drag. Look for a narrow profile and a waist belt that keeps the tow line taut rather than slack.
- Inflation and deflation — Quick-inflate valves let you set up in under a minute. Ensure the valve is easy to use with wet hands.
Our Top Picks
Best Overall: HUT Swim Buoy Tow Float (Orange)
The HUT is the most popular swim buoy in the UK for good reason. It is made from durable nylon PVC coating, inflates in seconds, and features a secure waist belt that stays in place at pace. The bright orange colour is highly visible in poor light and choppy conditions, and the internal dry storage fits a phone, keys, and a gel easily. Tried and trusted by thousands of UK open water swimmers and triathletes.
Best Value: Zone3 Safety Swim Buoy
Zone3’s own-brand tow float is a great option for beginners. It is lightweight, brightly coloured, and easy to use, at a price point that makes it accessible for anyone just starting out with open water swimming. The 20-litre capacity is generous, and it doubles as a rest platform when you need a breather mid-swim. A solid first buoy that will last several seasons with proper care.
Best Premium: RESTUBE Classic
RESTUBE takes a different approach with its inflatable rescue device that fits in a waist pack and deploys instantly with a pull tab. It is far smaller and less intrusive than a traditional tow float, making it ideal for race-pace open water training when drag is a concern. Used by professional open water swimmers and favoured by those training for long-distance events where minimal resistance matters.
Buying Tips
- Always swim with a buoy in open water — many venues now require it, and boat traffic can be unpredictable
- A 15–20 litre buoy is the sweet spot between visibility and drag for triathlon training
- Check that the waist belt fits over a wetsuit — some have limited adjustment range
Care and Maintenance
Rinse your buoy with fresh water after every open water session to prevent salt and grit degrading the fabric and valves. Deflate partially for storage and keep away from direct sunlight when not in use to extend the lifespan of the PVC coating. Check the tow line for wear before every session — a frayed line is a safety risk.
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