- For Next Day Delivery, please place your order before 1pm 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 5 business days to receive your order 

**Shipping times may be affected by busy sales periods such as the holiday season.

All of our styles fit true to size. On each product page there is a size guide which we would recommend taking a look before making your choice.

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 and payment methods are accepted, including Mastercard, Visa, American Express and Klarna.

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

Once your order arrives, you have up to 14 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.

Please note, orders containing sale items or free items are not eligible for returns.

Please get in touch via team@theunderdays.com to process your return.

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.