S fits 24–30″ waists, M fits 30–36″, L fits 36–44″. Measure where you'll actually wear it (often a couple inches below your natural waist for low-rise wear). When between sizes, size up — the knurled screw closure can be loosened and repositioned to take in extra length.

Yes. Only one end of the belt comes out of the buckle, so that's the end you cut. Loosen the knurled screw, slide that end out, and cut it clean across with sharp scissors. Slide it back in and tighten the screw. Then open Settings in the Nion app and tell it where the last LED is, so every effect fits the new length.

It's designed to sit on top of pants, skirts, or layered over a shirt. The silicone has just enough flex to accommodate up to a half-inch of fabric.

Tap the button once for the next preset, or twice to go back one. Hold it for a second to turn the lights off or back on. Three taps turns sync on or off, and four taps shows the battery level on the belt. You can change what the taps and hold do in the app. For everything else, like brightness, colors and your playlist, use the Nion app.

Yes. In the Nion app, open the preset and choose Use on power-up. The belt starts with it every time you turn it on.

Ninety-nine, organized into categories like Signature, Rave, Holidays, Seasons, Nature and Retro. Browse them all in the Nion app.

Not yet. Custom animations are coming to the Nion mobile app. Drop your email in the footer to be the first to know when it ships.

Wipe down with a damp microfiber cloth. For stubborn grime like sunscreen or glitter, add a little mild soap to the cloth. Keep water away from the USB-C port, don't submerge it, and let it air dry before charging.

No. It's rain and sweat resistant, not waterproof. It's made for a sweaty front row, a passing shower, or a spilled drink. Don't take it in the pool, ocean, or shower, and let it dry fully before charging.

Coiled loosely in the included pouch, away from direct sunlight. Don't store it folded sharply for long periods — the silicone takes a set after a few weeks of being creased.

Orders ship within 1–5 business days, then take 3–5 business days in transit in the US. Free shipping on US orders over $75; otherwise $7 flat.

Yes — to 38 countries. Delivery takes 5–10 business days via DHL or UPS depending on destination. Shipping is $14–22 calculated at checkout. Import duties are the buyer's responsibility.

30 days from delivery, on unworn items in original packaging. We send a prepaid label for US returns. Once we receive the package, refunds post in 3–5 business days. Worn items can't be resold and aren't returnable.

You should have a tracking email within 24 hours of placing the order. If you don't, check spam first, then email orders@nionlights.com with your order number.

One year from delivery, against manufacturing defects: dead LEDs, broken buckles, charging port failure, battery that won't hold a charge. We'll repair or replace at our discretion.

Damage from misuse: water submersion, cutting the fixed end of the belt (the one that stays in the buckle), crushing, intentional damage. We can usually still repair these for a flat fee; email us a photo and we'll quote it.

Email warranty@nionlights.com with your order number and a photo or short video showing the issue. We'll respond within one business day.