Tow Floats Explained: Why Open Water Swimmers Use One
A swimmer's head is a tiny dot on open water. From a boat, a paddleboard or the shore, you can be almost invisible, especially in choppy water or low light. A tow float changes that instantly. This explainer is part of our open water and triathlon guides.
What does a tow float do?
It does two jobs. First, visibility: a large, bright shape on the surface is far easier to spot than a swimmer's head. Second, support: if you get cramp, swallow water or just need a breather, you can hold the float while you recover. It doesn't replace swimming ability or safe habits, but it adds a valuable margin.
Types of Tow Float
| Type | How it works | Best for |
|---|---|---|
| Standard tow float | Inflatable buoy on a waist belt and leash | Visibility on every swim |
| Dry bag tow float | Inflatable chamber plus a roll-top dry bag | Carrying keys, phone and snacks on longer swims |
| Larger or hi-vis tow float | More surface area, brighter colours | Busy water, low light and sea swims |
How do you wear a tow float?
Clip the belt around your waist and adjust the leash so the float sits just behind your hips, where it won't knock your legs or tangle with your kick. Inflate it fully before you get in. Once you're swimming, you'll barely notice it; most swimmers forget it's there after a few minutes.
The mistake: Setting the leash so long that the float drifts out to the side or flips around in the wind.
What happens: It tugs at your waist, tangles with your legs in chop and is less useful when you need to grab it quickly.
How to avoid it: Keep the leash short enough that the float sits just behind your hips. Check it's fully inflated and the valves are closed before every swim.
Does every open water swimmer need one?
We recommend one for everyone, every time. Even at supervised venues, a tow float helps lifeguards and other swimmers see you. In the sea, on rivers or anywhere with boats, it's essential. Combine it with a bright cap and you've done the two simplest things to stay visible. Our open water accessories include tow floats in high-visibility colours.
What else keeps you safe in open water?
- Never swim alone, and tell someone where you're going.
- Enter the water slowly and let your breathing settle.
- Swim parallel to the shore and stay within your limits.
- Know what to do if you get into trouble: float on your back and control your breathing.
The RNLI's water safety advice covers this in more depth. As the water cools, your kit needs to change too; our guide on what to wear for cold water swimming explains how.
TOW FLOAT CHECKLIST
TOW FLOAT CHECKLISTInflate
InflateFully inflated, valves closed, before you get in.
Adjust
AdjustLeash short enough to sit behind your hips.
Combine
CombineWear it with a bright cap for maximum visibility.
How do you look after a tow float?
Rinse it in fresh water after every swim, especially after the sea, let it dry fully and store it partly deflated away from direct sun. Check the seams and valves regularly. If you're building up your kit for winter, our guide to what to wear for cold water swimming is the next read. Our neoprene accessories keep hands, feet and head warmer. Our swimwear experts are happy to help you choose.
Why Buy Open Water Kit From Allens Swimwear
We've helped pool swimmers move outdoors safely for years.
Written by a swimwear specialist at Allens Swimwear, 50 years of expert fitting. Updated 5 October 2026.
Frequently Asked Questions
What is a tow float for?
A tow float makes you visible to boats and other water users and gives you something to hold if you need to rest. It clips around your waist and trails behind you.
Does a tow float slow you down?
Very slightly, but most swimmers barely notice it once the leash is set correctly. The safety benefit far outweighs the tiny drag.
Can you put your phone in a tow float?
Dry bag tow floats have a roll-top compartment for keys and a phone. Always roll and seal it properly, and many swimmers add a waterproof pouch for extra protection.
Is a tow float a life jacket?
No. A tow float is a visibility and rest aid, not a life-saving device. It doesn't replace swimming ability, safe habits or supervision.
Do I need a tow float at an open water venue?
Many venues recommend or require them. Even where they're optional, a tow float helps lifeguards and other swimmers see you, so we recommend one every time.