For the perfect fit, don’t take a wild guess — take your hip
measurement! Standing with your feet together, wrap a soft
measuring tape around the widest part of your lower hip.
| Hip | Waist | Size | |
| XXS | 33-34" | 23-24" | Y14-00 |
| XS | 35-36" | 24-25" | 0-2 |
| S | 37-38" | 26-27" | 4-6 |
| M | 39-40" | 27-29" | 8-10 |
| L | 41-42" | 30-32" | 12-14 |
| XL | 43-44" | 33-35" | 16-18 |
| 1X | 44-46" | 37-39" | 16-18 |
| 2X | 48-50" | 41-43" | 20-22 |
| 3X | 52-54" | 45-47" | 24-26 |
| 4X | 56-58" | 49-51" | 28-30 |
| 5X | 60-62" | 53-55" | 32-34 |
The fabric for our BASE undies is designed to have a snug fit
that moves with you. If you're between sizes, we recommend
trying the larger size for BASE.
Our specially engineered lining combines super-absorbent Truetex™ technology with a leak-proof lining that absorb 4 tampons worth of fluid.
Our period underwear were made to fit into your regular laundry routine. Just rinse the gusset in cool water before washing in the machine with your regular laundry. Hang to dry where possible - it saves energy and prolongs the life of your undies!
Essential period underwear are made with the same super-soft, breathable & sustainable fabrics as our Boost underwear, but feature an ultra-thin, all-in-one gusset design that absorbs 4+ tampons worth of fluid. Everything you need—nothing you don’t.
Essential period underwear provide 4+ tampons worth of absorbency and can be used instead of disposable pads & tampons.
