Onthatass Promo Code 2026: -10% Welcome + Sales
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-10% welcome + saleson that ass
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About this offer
- Onthatass is a trendy underwear and lingerie brand for women and men:
- -10% welcome code via newsletter sign-up
- Discounted multi-piece packs and seasonal sales up to -50%
- Boxers, knickers, thongs, bralettes and coordinated sets
- Modern designs and quality fabrics (cotton, modal, microfibre, lace).
Use code on that ass at checkout on onthatass to get -10% welcome + sales. This offer is verified and regularly updated.
How to use an Onthatass promo code?
To activate your Onthatass promo code, add your items to the basket on onthatass.com. On the order summary, enter your code in the dedicated field and click "Apply". The discount shows on the total. Check the code's conditions (minimum amount, exclusions) before finalising your purchase.
Onthatass: trendy underwear and lingerie
Onthatass is an underwear and lingerie brand offering trendy, comfortable pieces for women and men. The brand focuses on modern designs, quality fabrics and varied colours for underwear that combines style and everyday comfort. Onthatass offers boxers, knickers, thongs, bralettes and coordinated sets.
Onthatass welcome offer
New Onthatass customers get a welcome discount on newsletter sign-up — generally -10% on the first order. Sign-up also gives access to new collection launches and exclusive flash sales. Create your account to enjoy loyalty benefits.
Recap of Onthatass offers
| Offer type | Detail | Condition |
|---|---|---|
| Welcome | -10% | Newsletter sign-up |
| Packs | Multi-item discount | Bundle purchase |
| Sales | Up to -50% | End of season |
| Newsletter | Exclusive codes | Email sign-up |
Onthatass delivery and returns
Onthatass offers standard delivery (3 to 5 days) and express where available. Returns are accepted within 14 days for unworn items with original tags. For hygiene reasons, underwear that has been worn can't be returned — check your size carefully before ordering.
Onthatass promo codes: how do the discounts work?
Onthatass promo codes generally apply across the catalogue, excluding items already on sale. Multi-item packs are already discounted and may exclude additional codes. One code per order. Some codes are sent exclusively by email to newsletter subscribers.
The Onthatass range: lingerie, boxers and bralettes
Onthatass offers knickers (classic cut, high-waisted, shorty), thongs and tangas, bralettes and triangle bras, coordinated two-piece sets, and men's boxers. The fabrics used include cotton, modal, microfibre and lace depending on the collection.
Onthatass flagship products
| Category | Fabrics | Indicative price |
|---|---|---|
| Knickers & shorties | Cotton, modal, microfibre | €8-15 |
| Bralettes | Cotton, lace | €15-25 |
| Lingerie sets | Coordinated cotton/lace | €25-45 |
| Men's boxers | Cotton, microfibre | €10-18 |
Onthatass customer reviews and lingerie alternatives
Onthatass customers appreciate the comfort of the fabrics and modern designs at accessible prices. Multi-piece packs offer good value. For high-end lingerie, Princesse Tam Tam is a French reference. Modibodi offers an alternative in washable period underwear. Zalando offers a very wide selection of lingerie across all brands.
What to know before ordering from Onthatass
Check the Onthatass size guide before ordering — lingerie must fit perfectly to be comfortable. Take your measurements (bust, waist, hips) and compare to the size chart. For underwear, aim for fitted rather than too loose for optimal support.
Onthatass promotions calendar
Onthatass runs promotions around Valentine's Day (February), the summer and winter sales, and Black Friday (November). Occasional flash sales are announced on social media (Instagram) and by newsletter. Subscribe so you don't miss the short-lived flash offers.
Frequently asked questions
How do I use an Onthatass promo code?
Add items to your basket on onthatass.com, then enter the code (e.g. "on that ass") in the dedicated field on the order summary and click Apply. Check any minimum amount and exclusions; one code per order, with some sent only to newsletter subscribers.
What is the Onthatass welcome offer?
New customers get -10% off their first order by signing up to the newsletter, plus access to collection launches and exclusive flash sales. Creating an account also unlocks loyalty benefits, and multi-piece packs add further value.
What does Onthatass sell?
Onthatass offers trendy, comfortable underwear and lingerie for women and men — knickers, thongs, bralettes, triangle bras, coordinated sets and men's boxers — in cotton, modal, microfibre and lace, with modern designs at accessible prices.
Can I return Onthatass underwear?
Only unworn items with original tags, within 14 days — worn underwear can't be returned for hygiene reasons. Check the size guide carefully before ordering, taking bust, waist and hip measurements to get the right fit first time.
How do I choose the right size?
Use the Onthatass size guide, taking your bust, waist and hip measurements and comparing them to the chart. Underwear should fit snugly rather than loose for optimal support, and since worn items aren't returnable, getting the size right matters.
When are the best Onthatass deals?
Promotions run around Valentine's Day (February), the summer and winter sales, and Black Friday (November), plus occasional flash sales on Instagram and by newsletter. Multi-piece packs are discounted year-round, and subscribers catch the short-lived flash offers.