Jessica P.
★★★★★
Backup on long shifts
“12-hour shifts, I wear these as backup. No more panic.”
Holds Up
to 50 ml
to 50 ml
Leak-
Resistant
Resistant
Soft Bamboo
Viscose
Viscose
SolVault™ FlowGuard
Bamboo Period Underwear 3-Pack
High-waisted, soft bamboo viscose period underwear with a leak-resistant barrier. Holds up to 50 ml. Wash, wear, repeat.
- Holds up to 50 ml
- Leak-resistant barrier
- Soft bamboo viscose
- High-rise, full coverage
Choose Your Bundle
9 Pieces — Best Value
Buy 3 PacksEnough for a full cycle · $12.21 per piece
$158.93$390.00
Choose a color set and size for each pack:
Pack 1
Pack 2
Pack 3
Save $100 — Most Customers Pick
Buy 2 Packs6 pieces · $13.32 per piece
$115.54$260.00
Choose a color set and size for each pack:
Pack 1
Pack 2
Buy 1 Pack3 pieces
$65.00$130.00
A color set and size:
Free Cycle Care GuideWear, wash and care tips (PDF)INCLUDED FREE
In stock — Ships within 24h
🎁 Free gift with your order today
Waterproof Travel PouchCarry a spare on the go.
Full Specs
- 3 pieces per pack
- Top layer: soft bamboo viscose
- Absorbent core, holds up to 50 ml
- Leak-resistant barrier layer
- High-rise, full coverage cut
- Care: rinse cold, machine wash cold (max 30°C), hang dry
- Sizes: S to 3XL
How It Works
The soft bamboo top layer sits against your skin, the absorbent core holds up to 50 ml, and a hidden barrier helps stop leaks. Wear it alone on lighter days, or as backup with your usual products on heavier days.
Shipping, Returns & Exchanges
Free US shipping. Orders ship within 24h on business days. Size exchanges on unopened packs within 30 days. 30-day satisfaction guarantee.
Made for Every Day of Your Cycle.
Home, work, sleep and travel.
The Real Problem
Leaks Happen. Disposables Add Up.
Ruined sheets, stained underwear and a drawer full of pads you keep rebuying. Period underwear gives you a reusable layer of backup you can just wash.
50 mlAbsorption per piece
S–3XLSix sizes
✕Worrying about leaks all day.✓SolVault™ soft, absorbent, leak-resistant.
What's Inside
Built for Comfort. Every Layer.
Every detail earned its place. Nothing decorative.
Soft Bamboo
- Gentle against your skin
- Breathable viscose
Easy Care
- Rinse, machine wash cold
- Hang dry
Three Pieces
- A full set in every pack
- Three color sets to pick
Overnight Backup
- High-rise, full coverage
- Sleep easier
Everyday Discreet
- No bulk under jeans
- Looks like regular underwear
Reviews
Why Women Switch and Stock Up
Rated 4.4 out of 5 stars.
Maria L.
★★★★★
So soft
“The bamboo fabric is really soft and does not feel bulky.”
Kate R.
★★★★★
Saves money
“Using way fewer pads now. Bought a second pack.”
A Full Day
Morning to Morning.
Where leaks usually catch you, and how these help.
-
7 AMThe commute. Worrying every time you stand up.SolVaultLeak-resistant barrier as backup.
-
12 PMThe office. Bulky pads you can feel all day.SolVaultSoft, thin bamboo feel.
-
3 PMThe workout. Shifting and bunching.SolVaultHigh-rise fit stays put.
-
8 PMThe couch. Just want to be comfy.SolVaultFeels like regular underwear.
-
2 AMThe night. Stained sheets in the morning.SolVaultFull coverage while you sleep.
Side by Side
SolVault™ vs The Alternatives.
Most women rely on pads, liners or regular underwear. Here is how they compare.
SolVault
✓Reusable
✕+Holds 50 ml
✕+Soft Bamboo
✕+No Bulk
✕+Machine Wash
✕+$15/piece
Pads
✕Single Use
✕+Absorbent
✕Plastic Feel
✕Bulky
✕Rebuy Monthly
✕Ongoing Cost
Liners
✕Single Use
✕Light Only
✕Plastic Feel
✕+Thin
✕Rebuy Monthly
✕Ongoing Cost
Regular Underwear
✓Reusable
✕No Absorption
✕+Soft
✕+No Bulk
✕+Machine Wash
✕Ruined by Leaks
By the Numbers
What's In Every Pack.
No fluff. Just what you get when you open the box.
50 mlAbsorption per piece
3Pieces in every pack
S–3XLSix sizes, high-rise cut
4Layers: bamboo, core, barrier, outer
Rated 4.4/5 by customers
Care
Wash in 3 Steps.
-
1
Rinse cold
Rinse in cold water after wearing until it runs clear.
-
2
Machine wash cold
Up to 30°C. No bleach, no fabric softener.
-
3
Hang dry
Air dry only, no dryer.
FAQs
Everything You Need to Know.
Plain answers to the questions we get the most.
How much does it hold?
Each piece holds up to 50 ml, which suits light to moderate days. On heavy days, use it as backup with your usual product.
How long can I wear one?
It depends on your flow. Change when it feels full, as you would with any period product.
Will it leak?
The barrier layer is designed to be leak-resistant. Fit matters, so choose your usual size.
Does it feel bulky?
No. It feels close to regular underwear.
How do I wash it?
Rinse cold, machine wash cold (max 30°C), hang dry. No softener or bleach.
Which colors are in a pack?
3 pieces in the color set you choose.
Can I exchange the size?
Yes, on unopened packs within 30 days, for hygiene reasons.
What's your guarantee?
30 days. If they are not for you, contact us for a refund.
Risk-Free Purchase
30 Days. Zero Risk.
Try them for a full cycle. If they do not make your period easier, contact us within 30 days for a full refund.
30-Day TrialFull refund. No questions asked.
Free US ShippingShips within 24h on business days.
Six SizesS to 3XL.
Reviews
Work, Sleep & Everything Between.
Nurses, students, moms and everyone who hates leaks.
Amy T.
★★★★★
Peace of mind
“No more checking every hour.”
Brianna S.
★★★★★
Comfortable
“Feels like normal underwear.”
Lauren M.
★★★★★
Workout backup
“Ran in them, felt secure.”
Rachel K.
★★★★★
Overnight
“Sheets stayed clean.”
Sofia G.
★★★★★
No bulk
“Nobody can tell under slacks.”
Tina W.
★★★★★
Long shifts
“Great backup.”
Jenny H.
★★★★★
Easy wash
“Rinse and toss in the wash.”
Kim N.
★★★★★
Travel friendly
“Packed three for a trip.”
Megan P.
★★★★★
Soft fabric
“Bamboo is so soft.”
Olivia D.
★★★★★
On my feet all day
“Felt secure.”
Grace L.
★★★★★
Bought for my teen too
“Her first pack, she loves them.”
Diana R.
★★★★★
Good fit
“High waist is comfy.”