louloucup
Lou – Seamless Period Thong, Light Flow
Lou – Seamless Period Thong, Light Flow
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For the days that aren't really your period — but aren't nothing either.
Lou is a seamless thong, cut for the days you'd otherwise waste a pad on: the spotting before it starts, everyday discharge, and the last two days when your flow has almost stopped. It holds 15 ml, the equivalent of about 1.5 tampons.
It's a thong, so it does what a thong does — disappears completely, under jeans, under a fitted dress, under anything. No seams, no edges, nothing to show through.
Most people wear Lou alongside a heavier style: Mathilde or Liv on days one and two, Lou for everything on either side of them. It also works as backup on a cup day.
Available in sizes XS to 2XL.
Materials
- Outer: 65% nylon, 35% elastane
- Absorbent core: TPU and microfiber
- Lining in contact with your skin: organic cotton
- OEKO-TEX® Standard 100 certified — certificate 2026OK1834, issued by AITEX
- Lab-tested · 25 ppb PFAS detection limit
- Designed in France since 2017
Care
Rinse in cold water right after wearing — cold water first, always.
Machine wash at 86°F (30°C) with the rest of your laundry. No fabric softener.
Air dry. Never tumble dry.
Size guide
Measure your hip at the fullest point. Between two sizes, size up.
| Louloucup size | US size | Hip (in) | Hip (cm) |
| XS | 2 | 33–34.5 | 84–88 |
| S | 4 | 35–36.5 | 89–93 |
| M | 6 | 37–38.5 | 94–98 |
| L | 8 | 39–40.5 | 99–103 |
| XL | 10 | 41–42.5 | 104–108 |
| 2XL | 12 | 43–45 | 109–114 |
Our underwear fits true to size. If in doubt, measure at the fullest point.
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