Frequently asked, fully answered.

Cut close, sat naturally on the waist, with a fully lined internal pouch. They run true to size — order your usual. If you're between sizes, most members size up for everyday comfort.

Most members size up. Size down only if you want a more athletic, compressive feel. Free UK exchanges if the first pair isn't right.

Yes — every Sullios brief has a fully lined internal pouch for support and coverage.

Our recycled fabric holds shape wash after wash. Slight softening on the first few wears, but the cut is engineered to maintain itself across hundreds of swims.

The Size Guide page has a 10-second fit quiz plus a full chart with a CM / inches toggle.

We take 1-2 Days to dispatch your order. Estimated shipping to UK: 1–3 working days. EU: 3–5 working days. US: 5–7 working days. Rest of world: 7–14 working days. All orders are tracked from dispatch.

Free shipping to UK on all orders.

Free Shipping to these countries over the below thresholds: Australia (A$140), Canada (C$140), Europe (EUR 90), New Zealand (NZ$ 150), USA ($120)

All other regions, Free shipping over £120

Duties and tax are included for UK and US orders, and for EU orders under €150 (IOSS threshold). Outside those, import duties may be applied by your local customs on arrival and are the responsibility of the customer. Please check your rates before ordering to avoid any surprise charges.

We aim for Same-day dispatch on orders before 2pm UK time, Monday to Friday. Orders after 2pm, weekends, or UK bank holidays ship the next working day.

Where possible be send delivery tracked - so you'll get an email with a tracking link as soon as your order leaves the warehouse.

30 days from receipt. Free UK returns, all other returns are the responsibility of the customer. Items must be unworn, with original tags and packaging.

We do not offer exchanges. If you would like to change your item, we suggest you process a refund request and order the desired item.

Yes, within 30 days. Return postage is paid by the customer except in the case of a faulty or wrong item.

We process refunds within 5 working days of receiving the return. Your bank usually takes a further 1–3 days to display the funds.

Email a photo within 14 days and we'll send a free replacement or a full refund — your choice.

Our briefs are made from recycled polyester for sustainability, often mixed with lycra for a softer finish and stretch. They are regenerated from fishing nets and other ocean and landfill waste. Chlorine-resistant, UV-resistant, and made to last.

Cold rinse in fresh water after every swim and hang to dry. Hand wash - No machine washing, tumble drying or ironing.

Yes — our recycled materials hold up to chlorine and saltwater. Rinsing after each swim doubles their lifespan.

Free membership. Sign up with your email and get 24-hour early access to drops, and members-only sales via our VAULT. Join on the Inner Circle page.

1 pair: full price. 2 pairs: 10% off. 3+ pairs: 15% off. Auto-applies at checkout — no code needed. Excludes Vault sale items.

That's the surprise. We drop multiple times over summer. Inner Circle members get a 24-hour members-only window before the drop opens to the public.

No — Vault sale items already carry a members-only discount, so they're excluded from the bundle stacking. Bundles apply to current Originals only.

Yes — Klarna 3-payments (no interest) is available at checkout for UK orders.

GBP (default), USD, EUR. Checkout in your local currency at live exchange rates.

Most codes don't stack with the auto-applied bundle. The site picks the best deal for you at checkout — whichever is the bigger saving.