Running Accessories
The small things decide how a run feels. A cap that keeps sun and rain out of your eyes without trapping heat. A soft flask that fits your short so you can hydrate without carrying a bottle. Lights that make you visible on the dark winter mornings when most of the training actually happens. Sunday Running accessories follow the same principle as our shorts: carry what you need, forget it's there.
The collection
Sunday Running Cap — €34.95
Lightweight and breathable, built for protection without the bulk. One size, in Black and Off White.
Sunday Running Soft Flask (300 ml) — €9.95
Sized to fit precisely in the liner pocket of the Ultimate 2-in-1 Running Short — 300 ml of water or sports drink that moves with you, with zero bounce.
Sunday Running Lights — from €14.95
Adjustable LED armbands in red and white, available separately or as a set, for the runs that start before sunrise or end after dark.
Sunday Performance Socks — €14.95
Anti-blister knit, supportive compression and cushioned impact zones. One size fits EU 39–46.
Which accessories do you actually need?
- For long runs: a soft flask in your short pocket for runs over an hour, and anti-blister socks.
- For summer: a lightweight cap against sun and sweat in your eyes.
- For autumn and winter: LED lights so cars and cyclists see you — wear one on each arm, red at the back, white at the front.
- For race day: the cap for weather, the flask for the stretch between aid stations, and socks you've tested in training.
See also
Running shorts · Running shirts · Running socks
Free shipping over €70. Orders placed before 5 PM ship the same day. Easy returns within 14 days.
Need help?
Frequently asked questions
Yes — the 300 ml flask was sized to fit the liner pocket of the Ultimate 2-in-1 Running Short. It sits against your thigh and doesn't bounce. As you drink, it collapses, so it takes up less room the further you go.
They're adjustable LED armbands that strap around your upper arm, wrist or ankle. Available in red and white, or as a set so you can run with a white light at the front and a red light at the back, the same way a bike is lit.
The cap is lightweight and breathable, built primarily for sun and sweat. In rain it keeps drops out of your eyes; it's not a waterproof shell.
One size, adjustable at the back.
The cap and socks are the safe choices — no size risk. The flask and lights are small add-ons that runners rarely buy for themselves but use every week. Combine them with a short to pass the €70 free-shipping threshold.
Orders placed before 5 PM ship the same working day. Shipping is free over €70.