There is no universal rule about underwear under leggings. The choice can depend on the garment’s lining, coverage, seams, the activity, personal comfort, and what you plan to do after the workout.
Check the leggings first
Read the product information for the exact pair. Look for the fibre composition, lining, gusset, seams, coverage, care instructions, and return terms. A product photograph cannot show how the fabric behaves when you bend or how much coverage it provides in every position.
Try the basic movements
Walk, sit, squat, bend, and reach. Notice whether the waistband or seams rub, whether the garment shifts, and whether you feel adequately covered. If another layer makes the fit uncomfortable, try a different cut or size rather than assuming that every pair should be worn the same way.
If you choose underwear
Select a style whose coverage, seams, and fabric feel comfortable under the leggings. Check the care instructions and change out of damp clothing when practical. Do not describe a particular fibre as automatically hygienic, antimicrobial, or safer for sensitive skin unless the product record supports it.
If you do not choose underwear
Make the decision based on the exact garment and your own comfort. Check the lining and coverage before wearing it for exercise or everyday use. Wash the leggings according to the product instructions and do not treat “seamless” or “sweat-wicking” as a guarantee of a health or hygiene result.
The right choice is the one that provides the coverage and comfort you want without creating a product claim that the garment cannot support. If persistent irritation or another health concern occurs, seek appropriate professional advice instead of relying on a clothing guide.
