Quick answer

Switch to seamless underwear with a thin waistband and moderate coverage, like the OnGossamer Cabana Cotton Seamless Bikini. If lines persist, check the fabric fit or consider a thong.

Why seamless underwear works

Seamless underwear uses bonded edges instead of stitched hems, which eliminates the ridge that creates visible lines under tight clothing. The OnGossamer Cabana Cotton Seamless Bikini, for example, uses a thin waistband and a low-rise cut that sits on the hips, reducing the chance of a panty line across the buttocks.

When seamless may not be enough

If your pants are very thin or ultra-tight, even a seamless edge can sometimes show. In that case, a thong or a G-string offers the least coverage and the fewest lines. Seamless bikinis are best for moderate to high-waist pants and leggings.

Diagnosis: Is it the panty or the pants?

  • Symptom: Visible line across the buttocks or along the hip under fitted pants, leggings, or skirts.
  • Likely cause: Stitched hem or thick waistband pressing against the fabric. Tight clothing exaggerates the ridge.
  • Corrective action: Switch to a seamless style like the OnGossamer Cabana Cotton Seamless Bikini. Ensure the waistband sits where your pants sit—low-rise for low-rise pants, mid-rise for mid-rise pants.
  • Stop or choose another option: If lines still show after trying a seamless bikini, the fabric of your pants is too thin or too tight. Choose a thong or G-string for zero lines, or wear a slip with a built-in liner. Seamless works for most outfits. For ultra-sheer or tight bottoms, a thong is the reliable fix.

Product facts

  • Cabana Cotton Seamless Bikini: Ultra-soft cotton/spandex material, low-rise, moderate rear coverage, seamless bikini cut with a thin waistband. The thin waistband and seamless edges prevent the visible ridge under clothing, while moderate coverage balances comfort and line reduction.

    Cabana Cotton Seamless Bikini

    Cabana Cotton Seamless Bikini