Quick Answer (AEO)
Traditionally, no – the “regimental” style is to wear nothing under a kilt. Today, it’s personal choice. Many people wear underwear (briefs/boxer-briefs) or compression shorts for comfort, sport, modesty, or hygiene. Pick what suits the event, climate, and your comfort and don’t pin both aprons together.
Tradition vs. Today
- Historically (regimental): Kilts were worn without underwear, especially in military and ceremonial contexts—part practicality, part pride and humour.
- Modern practice: At weddings, festivals, and everyday wear, most people choose supportive underwear. It’s about comfort, confidence, and the occasion.
For a fuller cultural explainer, see our guide: What Is Worn Under a Kilt?
What to Wear (and When)
Formal events (weddings, black-tie)
- Either approach is acceptable, but most modern wearers opt for plain, seamless briefs/boxer-briefs to avoid visible lines when sitting or dancing.
- Pair with: Prince Charlie Outfits, Dress Sporrans, Ghillie Brogues.
Highland Games, piping, dancing, ceilidhs
- Choose moisture-wicking boxer-briefs or light compression shorts to prevent chafing and keep everything in place while moving.
Daywear & travel
- Breathable cotton or bamboo boxer-briefs = comfort for long days, flights, or car rides.
Cold or windy weather
- Thermal base-layer shorts are practical. Heavier tartans plus a correctly weighted sporran help the apron hang neatly.
Etiquette (and Good Manners)
- Don’t ask a kilt wearer what’s underneath that questions considered cheeky.
- Sit smart: Guide the apron, knees together or slightly angled, sporran on your lap. Full guide: How to Sit Down in a Kilt
- Pin properly: A kilt pin goes through the outer apron only—never both aprons shut. See How to Pin a Kilt
Fabric & Fit Tips
- Avoid shiny synthetics that trap heat—pick wicking fabrics.
- Seamless edges reduce lines under lighter tartans.
- Length matters: Mid-thigh boxer-briefs or short compression trunks won’t peek below the hem when sitting.
- Confidence first: If you’re self-conscious, wear supportive underwear; if you prefer tradition and it suits the event, going regimental is still a thing.
Women & Children
- Women: Undergarment choice is entirely personal. With a kilt skirt, seamless briefs or shorts are common for comfort and modesty. Explore: Women’s Kilts.
- Children: Practicality wins—comfortable underwear or shorts for school or events.
Pair the Fundamentals
- Kilt height: Worn at the navel, hem to mid-kneecap. If you’re new, start with How to Measure Yourself for a Kilt
- Sporran height: Roughly 3–4 in (7–10 cm) below the belt buckle. See How to Wear a Kilt and Sporran
- Footwear: Brogues with laces tied on the outside of each leg. See How Do You Tie Kilt Shoe Laces?
- Finishers: Kilt Hose & Flashes · Belts & Buckles
FAQs
Is it disrespectful to wear underwear under a kilt?
No. Today it’s your choice—tradition is respected either way when you wear the outfit correctly.
What about law or venue rules?
Public decency rules vary by place and event. If in doubt, wear underwear—especially at family or formal gatherings.
Best colour for underwear?
Black or skin-tone under light tartans; avoid bright colours that might show when sitting.
External Resources (heritage context)
- Scottish Tartans Authority — background on Highland dress
- National Museums Scotland — historic Highland attire
- CeltGuide — tartan basics & culture
(We cite these for culture and etiquette background; they don’t dictate your personal choice.)
Conclusion
Do you wear pants under a kilt? Traditionally no; today it’s up to you. Choose the option that fits the occasion, climate, and your comfort—and focus on good fit, proper sporran height, and tidy etiquette. That’s what makes Highland dress look unmistakably sharp.
Build your kit:
Kilts · Sporrans · Kilt Hose & Flashes · Ghillie Brogues