- For Next Day Delivery, please place your order before 2:00pm GMT (Monday-Thursday) to receive it on the next business day.

- For Standard Delivery, shipping will take 2-3 business days 

- For non-mainland UK addresses, please allow up to 2 business days to receive your order

- For non-mainland UK addresses, please allow up to 5 business days to receive your order 

**Shipping times may be affected by busy sales periods. 

All of our styles fit true to size. On each product page there is a size guide but in case you missed it, please find details here

For the moment we are shipping exclusively within the UK but we have plans in place for an arrival in Europe soon

All major credit cards are accepted, including AMEX.

Of course, you can either text us on +447888300084 or get in touch via team@theunderdays.com

You have up to 30 days to return your order, free of charge. We expect to receive your order in the same condition it was delivered in, including all tags and hygiene stickers attached to the garment.

Visit our returns portal here to choose your returns method

We recommend washing all our underwear on a cool wash, maximum 40 degrees. 

Air-dry flat in shade. Do not iron or tumble dry

We’re not perfect but we’re working on it. Click here to read more about our sustainability plans.