Silicone swim caps for triathlon: what race organisers get wrong
Race caps are a different job from club caps. Here is where organisers trip up, from wave colours to the date the boxes need to land.
Bruno P., 2026-10-26
A club orders caps once and lives with them for years. A race orders caps for one morning, and then has to hand every athlete the right one, in the right colour, sometimes with the right number on it, inside a race pack that gets stuffed days before the start. That's a different job. Nearly every problem below can be settled at the quote stage, which is also the cheapest place to settle it.
This guide is about event caps: triathlon, aquathlon, open water legs of a multisport race. If you're buying caps for a club to train in, the silicone vs latex vs suede guide is the better place to start.
Check what your rules actually say about caps
If your race runs under World Triathlon rules, or a national federation that follows them, the cap is not just merchandise. Rule 4.11 a.) of the World Triathlon Competition Rules (13 December 2025 edition, with amendments up to 29 April 2026) opens like this:
All athletes must wear the official event numbered swim cap during the swim segment
World Triathlon Competition Rules, 4.11 a.) (i)
The same rule says numbered caps are provided by World Triathlon or the Local Organising Committee, that a second cap worn underneath must be unbranded with the official cap on the outside, that athletes may not alter the caps, and that no sponsor logos are allowed on the official cap other than those prescribed by World Triathlon or the organising committee. So if you are the organising committee, the logos on the cap are your decision, and the number is part of the cap.
What the rule does not do is tell you which colour each wave wears. That's yours to plan. And if you run a local age-group race under your national federation, read that federation's own rulebook. I'm not going to guess what it says.
Mistake 1: picking wave colours after ordering
Wave colours are easy to change on paper and awkward to change once the quote is done. A start list grows, a wave gets split, and every change means a new count per colour, and possibly a new visual. Decide the waves first, then the colours, then ask for prices.
A few practical points on choosing:
- Keep neighbouring waves far apart on the colour wheel. Dark navy and royal blue look different on a swatch card. Across a lake in early light, from a start pontoon, much less so.
- Check the print still reads on every colour. A white logo that pops on navy vanishes on a white cap. Fluor yellow print on a fluor yellow cap is no print at all.
- Use the printer's chart, not your screen. The silicone range has 29 colours, each matched to a Pantone, for example Neon orange E1 (Pantone 811C), Fluor yellow SH83F (600C), Kelly green F217 (355C) and Neon pink SC16 (806C). For latex, ask which colours are available when you request the quote.
- Put the colours in the athlete guide before anyone asks. Athletes find their wave by cap colour, and so do your start officials.
One thing to ask outright: does the quantity band count across your whole order, or per cap colour? If you split 400 caps into four waves of 100, the answer matters. I wouldn't assume either way.
Mistake 2: treating numbers as an afterthought
A numbered cap is a personalised cap: every single one is different. That's not the same job as a logo printed 400 times, and it's priced separately. Our quote form has a named caps option at extra cost; if you need numbers, say so in the request, with the number range per wave, and the quote will tell you how it's done and what it costs.
Numbers also change how you think about spares. With plain logo caps, any spare fits any athlete. With numbered caps, a late entry needs a number that exists. Leave gaps in the range for late entries and transfers, and have a small stock of unnumbered caps in each wave colour for the athlete who leaves theirs in the car.
Mistake 3: buying silicone when latex would do, or the other way round
For a one-off race, latex is the obvious choice on cost. The printer's latex cap weighs 20 g, is very stretchable, and is described on its own page as "commonly used for one off events or giveaway hats". The minimum order is 100. Silicone is 50 g, sold for daily use with "loads more wear guaranteed", and minimum 50.
The argument for silicone at a race is what happens after it. A silicone cap is built for daily training, so athletes can go on wearing your race logo, and your sponsor's, at the pool for a long time. If a sponsor is paying for the caps, that's worth putting in front of them. For a big field on a tight budget, latex. For a smaller race, a race with a sponsor who wants to be seen, or a finisher's cap you want people to keep, silicone.
For a small elite or invited wave there's also the competition cap (FVC3 race cap): full volume, designed to avoid wrinkles, print area up to 90 x 90 mm, minimum 25. See the competition caps page.
| Cap | Weight | Minimum order | What the printer says it's for | Worth knowing |
|---|---|---|---|---|
| Latex | 20 g | 100 caps | "One off events or giveaway hats" | Thin and very stretchable, cheaper than silicone |
| Silicone | 50 g | 50 caps | Daily users, "loads more wear guaranteed" | Athletes keep training in it after the race |
| Competition (FVC3) | Not stated | 25 caps | Competitive racing | Full volume, designed to avoid wrinkles, print area up to 90 x 90 mm |
All three are priced in your quote, within 24 hours, with free standard delivery in Europe. The only fixed price on our pages is for UK silicone: one print colour on one side is GBP 4.99 per cap at 300 to 499 caps, including 20% VAT. A 400-athlete UK race with a single-colour logo sits right in that band, before numbers, which are extra. Full detail is on the latex and silicone pages.
One small trap: the latex minimum is 100, and the price per cap moves with quantity bands. If your entry list sits just under a round number, ask for both quantities in the same request. You can then see what the extra caps cost and decide whether the spares are worth having.
Mistake 4: a sponsor wall on a swim cap
The printer works with up to 6 print colours, subject to artwork. That sounds like plenty until the race logo uses three, the title sponsor sends a logo with four, and two partners each want theirs in full colour. You've now got a design that can't be printed as sent, and a week of emails ahead of you.
What works:
- Agree with sponsors early that cap logos are one colour, in a colour you choose to suit the cap. Ask each sponsor for a one-colour version of their logo, in vector format.
- Use the second side. The quote form lets you print one side or two. Race logo on one side, title sponsor on the other, is easier to read than everything crammed together.
- Fewer logos, bigger. A cap is curved and stretched over a head. Small text and thin lines are the first things to go.
The longer version of this, with what happens to gradients, hairlines and raster files, is in why a logo looks wrong on a silicone cap.
Mistake 5: ordering for race day instead of packing day
Standard production is about 3 weeks from artwork approval (one of the printer's pages says from approval and payment, so don't let the invoice sit). That clock starts when you approve the visual, not when you first email. And the date that matters is not the race. It's the day your volunteers stuff race packs, or the first day of packet pick-up, whichever comes first. When we ask for your hard deadline, that's the date we mean.
If you are already late, Express and Super Express options exist. Ask for them in the request and the quote will say what they cost and when the caps arrive. One customer review on the printer's site puts it plainly:
Silicone hats, 2 colour print, look and feel great. We needed express delivery and they arrived as requested.
Lindsay, a Euro Swim Caps customer review
Express is a rescue, not a plan. The 6-week countdown works backwards from your date and is worth reading before you send anything.
Mistake 6: one box, wrong address
The quote form asks whether you want one consolidated delivery or a split delivery. For a race that can matter: caps for a race series held in different towns, or one box to the race office and another to a club. Say what you need when you ask for the quote, with the addresses. For Sweden, Denmark, Finland and other EU countries, VAT and delivery terms are confirmed in your quote. For Norway and Iceland we handle customs on our side, and prices there are quoted without VAT.
A short checklist for the quote request
- Waves, colours and the number of caps per colour.
- Whether caps are numbered, and the number range per wave.
- Material: latex, silicone or competition caps.
- Logos in vector format (.ai, .eps, .pdf or .svg), with Pantone references, and whether you want one side or two.
- Your hard deadline: the packing day, not race day.
- Delivery address, or addresses if you need it split.
There's a fuller version in what to send a cap printer. And if you want to see which other races are on the same weekend, the events calendar lists events in 36 countries from official federation calendars.
Frequently asked questions
Do World Triathlon rules require numbered swim caps?
Rule 4.11 a.) of the World Triathlon Competition Rules says all athletes must wear the official event numbered swim cap during the swim, and that numbered caps are provided by World Triathlon or the Local Organising Committee. For local races, check your national federation's rules.
Latex or silicone caps for a one-off triathlon?
Latex is cheaper and the printer pitches it for one-off events; the minimum is 100 caps. Silicone costs more, starts at 50 caps, and athletes can keep training in it. Your quote prices both if you ask.
How many colours can sponsor logos use on a race cap?
Up to 6 print colours in total, subject to artwork. Asking sponsors for one-colour logos and using the second side keeps a race cap readable.
How long does a race cap order take?
About 3 weeks from artwork approval for standard production. If that's too slow, Express and Super Express options exist: ask for them in the quote request.