Quick answer

Briefs ride up mainly because the size is wrong, the leg openings are too loose, or the fabric has lost its stretch. Start by checking your waistband and leg fit: if you can pull more than two fingers under the leg elastic, size down or switch to a high rise cut with encased elastic. If the fabric is stretched out, replace the pair.

Check the waistband and leg fit first

A waistband that slides down or rolls forces the fabric to migrate upward as you move. Similarly, leg openings that are too loose allow the brief to shift with every step. Try this test: put on the briefs and run your thumb under the leg elastic. If there is more than a finger's width of slack, the leg is too big. If the waistband gaps when you bend sideways, the size is off. For a secure fit, the waistband should sit flat against your natural waist without digging in, and the leg elastic should hug your crease gently.

Fabric and construction matter more than you think

Cotton briefs with high stretch recovery hold their shape better than loose knits. Look for encased elastic in the waistband and leg openings, which prevents rolling and twisting. Avoid briefs with raw-cut edges if you want stay-put performance; they tend to curl. Also, check the gusset: a wider gusset reduces friction and keeps the center panel flat.

When to size down and when to size up

If the briefs feel loose in the legs but tight in the waist, you may need a different cut, not a different size. High rise briefs often solve this because they sit higher on the waist and have a longer leg line. If the waistband leaves red marks but the legs are fine, size up and choose a style with a softer band. If the legs ride up but the waist is comfortable, size down or switch to a style with tighter leg elastic.

Diagnose your ride-up problem

  • Symptom: Waistband slides down and fabric bunches at the crotch: Likely cause: The waistband is too loose or has lost elasticity. Corrective action: Size down or switch to a style with encased elastic in the waistband, like high rise briefs. If the fabric is stretched out, replace the pair. If a new pair in the correct size still slides, the cut may be wrong for your shape.
  • Symptom: Leg openings ride up and cause wedgies: Likely cause: Leg elastic is too loose or the leg opening is too wide. Corrective action: Choose briefs with snug leg elastic and a higher cut. High rise briefs often have a longer leg line that stays put. If the legs still ride up, try a different brand or style with tighter leg openings.
  • Symptom: Briefs twist and roll throughout the day: Likely cause: Fabric lacks stretch recovery or the briefs are too big. Corrective action: Look for fabrics with good stretch recovery and a secure fit. Avoid raw-cut edges. If the problem persists, consider a different size or style. When multiple fixes fail, it may be time to try a different cut or brand.

Product facts

  • High Rise Briefs - Petrol Blue: Molke High Rise Briefs sit comfortably on your natural waist with soft bands that don't dig in, and have encased elastic in the waistband to help them stay in place. A high rise cut with encased elastic reduces rolling and keeps the brief from migrating upward, directly addressing ride-up.
  • High Rise Briefs - Navy ***: This Navy High Rise Brief is part of the Bra Boot Sale and is non-returnable, non-exchangeable and non-refundable. If you are experimenting with sizing, a final-sale item carries risk; choose a returnable style first to confirm your fit.