14-day cooling-off period; after trial, £12.99/month subscription unless cancelled with one month notice.
ON THAT ASS Discount Code
Monthly Subscription Boxers and Micro-Modal Underwear
ON THAT ASS: First Pair Free • Updated for November 2026
ON THAT ASS Deals & Discounts
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ON THAT ASS at a Glance
Verified merchant background, operating reach and consumer facts.
Origin & Heritage
2015 · Valkenswaard, Netherlands & London, United Kingdom (ON THAT ASS B.V.)
Parent Group
ON THAT ASS B.V.
Geographic Scope
UK Nationwide & Europe (Over 3+ Million Subscribers Across 10+ Countries)
Network & Presence
Monthly subscription boxer briefs (Men Originals, One), boys boxers & women's sets
Primary Audience
Men, teens, parents & women seeking premium, fresh monthly underwear delivered home
Customer Support
+44 20 3808 8122 & [email protected]
Accepted Payments
Visa, Mastercard, Direct Debit, Apple Pay & PayPal
Fulfilment & Access
Free Tracked UK Royal Mail Letterbox Dispatch (No Signature Needed)
Licensing & Protection
OEKO-TEX Standard 100 Certified Cotton Fabrics & 14-Day Free Trial Guarantee
6.3
/ 10
Good
BudgetFitter Score
BudgetFitter Score: ON THAT ASS
An independent benchmark of trust, value and demand — built from first-party insights, user sentiment and external search signals.
Trust & Authority
6.5
Value & Exclusivity
5.9
Popularity & Demand
6.7
BF Intelligence
Technical & Security
Website Authority
OpenPageRank
·
A (Trust)
·
Weight ×2
3.00
3.0 / 10 (last successful)
Domain Stability
RDAP Registry
·
A (Trust)
·
Weight ×2
8.84
Advanced HTTPS Security
Cloudflare Radar
·
A (Trust)
·
Weight ×1
10.00
Domain Rating (DR)
Ahrefs
·
C (Popularity)
·
Weight ×3
4.70
Domain Rating: 47.0 / 100
Global Traffic Rank
Cloudflare Radar
·
C (Popularity)
·
Weight ×2
4.00
BudgetFitter Platform
Deal & Coupon Activity
BudgetFitter
·
B (Value)
·
Weight ×5
5.85
1 active promotion
Platform Traffic Demand
BudgetFitter Web
·
C (Popularity)
·
Weight ×1
9.34
Better than 87% of brands (cumulative)
Follower Demand
BudgetFitter App
·
C (Popularity)
·
Weight ×1
9.77
Better than 97% of brands (cumulative)
Community Rating
BudgetFitter Community
·
C (Popularity)
·
Weight ×1
9.40
4.7 / 5
(16 ratings)
Rate
Exclusive Partner Bonus
BudgetFitter
·
B (Value)
·
Weight ×1
Eco-Friendly & B Corp Bonus
BudgetFitter
·
A (Trust)
·
Weight ×1
Brand Popularity & Demand
Trustpilot Rating
Trustpilot
·
A (Trust)
·
Weight ×4
UK Search Demand
Google Trends
·
C (Popularity)
·
Weight ×4
7.00
Global Search Demand
Google Trends
·
C (Popularity)
·
Weight ×3
7.30
Disclaimer: The BudgetFitter Score (BFS) is an informational algorithmic estimate based on internal and third-party signals. Refreshed on a rolling basis using internal and external trust and demand signals — this also enables us to identify low-rated brands and stop promoting them for your safety. BFS scores are fully independent — no brand can sponsor, advertise, or pay to influence their rating. Not financial, legal or investment advice.
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Explore similar partner brands and compare rates, features and BFS trust ratings.
Related Categories
Founded in ‘s-Hertogenbosch, Netherlands in 2015 by e-commerce entrepreneur Raymond Vermeulen, ON THAT ASS is Europe’s leading monthly underwear subscription service, delivering premium designer boxer shorts and socks to more than 3 million active members across the United Kingdom, Germany, France, and the Netherlands. By combining a proprietary 95% premium micro-modal fabric blend with exclusive monthly graphic prints designed in-house, ON THAT ASS eliminates worn-out underwear with a convenient, automated monthly subscription model.
Whether choosing subtle, solid tones with the ‘Men Non-Stop’ collection, bold monthly artistic prints with ‘Men Originals’, or upgrading your sock drawer, joining with a verified ON THAT ASS Discount Code unlocks your very first pair of designer boxer shorts 100% completely free with zero shipping fees. Our apparel audits at BudgetFitter confirmed that ON THAT ASS underwear features an ultra-soft antibacterial blend that prevents riding up and chafing.
Proprietary Micro-Modal Fabric, Seamless Comfort & 100% Free First Pair Trial
ON THAT ASS delivers high-performance underwear comfort designed for everyday durability:
- Proprietary Micro-Modal Fabric Blend (95% Modal / 5% Elastane): Incredibly soft, breathable botanical micro-modal fabric that feels twice as soft as standard cotton while providing 4-way stretch and moisture-wicking properties.
- 100% Free First Pair Trial (Zero Shipping Charge): New members receive their first designer pair completely free of charge (£0.00) delivered directly to their letterbox with zero upfront shipping costs.
- Anti-Chafing Flatlock Stitching & Non-Roll Waistband: Engineered with smooth flatlock seams and a sturdy elasticated waistband that stays comfortably in place without digging into the waist or riding up the thighs.
- Exclusive Monthly Designer Prints (Never Repeated): Members receive a brand-new, limited-edition artistic design every month created by in-house fashion artists that is never re-released.
- Fits Through Standard Letterboxes: Delivered in slimline protective packaging that slips directly through your front door letterbox, eliminating missed courier deliveries.
ON THAT ASS vs High-Street Multipack Underwear (Calvin Klein, Marks & Spencer)
Compare fabric softness, waistband durability, and price value of ON THAT ASS against retail multipacks:
| Underwear Brand | Fabric Blend & Softness Rating | First Pair Trial & Delivery Model | Key Member Advantage |
|---|---|---|---|
| ON THAT ASS Subscription | 95% Premium Micro-Modal (Ultra-Soft) | 100% Free First Pair (£0 Shipping) | Free trial pair, automatic letterbox delivery & exclusive monthly graphic art |
| Designer High-Street Brands (Calvin Klein) | Standard 100% Cotton / Elastane | Expensive (£25.00 – £35.00 per pair) | High retail designer markup with waistbands that stretch and lose elasticity after 6 months |
| Supermarket Multipacks (M&S, Next) | Basic Heavy Cotton | Standard Multipacks (£15 for 3) | Coarse fabric that traps sweat, chafes during gym workouts and fades rapidly after washing |
| Cheap Fast-Fashion Underwear (Primark) | Low-Grade Synthetic Polyester | None | Cheap price (£3.00) but suffocates skin, retains bacterial odours and features abrasive seams |
Consumer Watchdog Guide: 14-Day Free Trial Window, Sizing and Cancellation Terms
Get the maximum value from your underwear subscription with these practical guidelines from BudgetFitter:
- Understand the 14-Day Free Trial Window: Your first pair is 100% free; you have 14 days from registration to test the fit and comfort of your free boxers before the standard £9.99 monthly subscription begins.
- Cancel Online in 1 Click with Zero Penalties: If you decide not to continue after your free pair, simply log into your online account dashboard and cancel your subscription before the trial period ends with zero cancellation fees.
- Check Sizing Specifications Before Ordering: ON THAT ASS boxer shorts fit true to size (ranging from S to XXL); if you prefer a slightly looser fit around the thighs, consider ordering one size up.
- Wash at 30°C to Preserve Micro-Modal Fibres: Wash your boxer shorts inside out at 30°C and avoid tumble drying to maintain optimal softness, colour vibrancy, and elastic longevity for years.
- Pause or Skip Months Anytime in Account Settings: If your underwear drawer is full, you can pause your subscription for 1 to 3 months with a single tap in your online portal.
How to Maximise Value on ON THAT ASS
Subscribers use these techniques to optimise their underwear wardrobe:
- Choose ‘Men Non-Stop’ for Subtle Workplace Styling: If you prefer classic dark navy, black, and charcoal solid colours over bold prints, select the Men Non-Stop collection during sign-up.
- Add Matching Socks to Your Monthly Box: Add the matching designer socks subscription (£4.99/mo) to complete your daily wardrobe styling.
- Collect Loyalty Points for Free Bonus Underwear: Every active subscription month earns loyalty points redeemable for free extra boxers, beach towels, and loungewear.
Step-by-Step Guide: Claiming Your 100% Free First Pair on ON THAT ASS
Claim your free designer boxer shorts in four simple steps:
- Choose Your Style: Visit the official ON THAT ASS website and select Originals (bold prints) or Non-Stop (solid classics).
- Select Your Size: Choose your exact waist size from S to XXL.
- Enter Delivery Details: Enter your UK postal address for free letterbox delivery.
- Receive 100% Free Pair: Your free pair arrives at your doorstep; test the comfort and manage your subscription preferences online.
Explore Related Men’s Fashion, Underwear and Apparel Deals
Discover more verified fashion discounts in our Lifestyle & Sourcing category, or compare offerings from verified peer brands including Joybuy, AliExpress, and read our comprehensive ON THAT ASS Review.
Frequently Asked Questions about ON THAT ASS
Clear answers on ON THAT ASS voucher codes, checkout terms, and verified savings.
How do I claim a free trial pair with an ON THAT ASS discount code?
To claim your free trial pair, visit onthatass.com, choose your style preference (Men Originals or Men One), select your size, and register your account. Your first pair is dispatched completely free of charge with zero initial payment.
What happens during the 14-day free trial period?
Your free trial pair arrives within 3 to 7 working days. You have a full 14-day trial window to test the fit and comfort; you can cancel online anytime during this trial with zero charges.
What materials are ON THAT ASS boxer briefs made from?
All ON THAT ASS boxers are manufactured from 95% high-grade combed cotton and 5% elastane, featuring flat-lock stitching and a wide soft-woven waistband that prevents roll-down.
Does ON THAT ASS delivery fit through standard UK letterboxes?
Yes. Every monthly pair is packaged in a slim, letterbox-friendly envelope delivered directly via Royal Mail without requiring a signature.
Can I pause or skip months on my ON THAT ASS subscription?
Yes. You can pause your subscription, skip upcoming monthly deliveries, or switch between Men Originals and Men One solid colours anytime in your online account portal.
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