woman wearing a black pair of sustainable non toxic underwear

A gusset worth talking about

Our gusset is 31% wider than the industry standard†

Fuller coverage, better fit, and intentional support where it counts.

side-by-side comparison of flimsy underwear gussets vs. Adelfi underwear gusset

Front wedgies? We don't know her.

Adelfi's underwear is sewn down to stay put

Our designs have built in support that sits flat and doesn't shift or bunch.

Stay cool & dry

We craft our underwear gussets with 100% cotton — the #1 fabric recommended by gynecologists†

Your most intimate area deserves the best. Breathable, absorbent, and gentle on sensitive skin.

Our fabric standards

OEKO-TEX® Certified Fabrics

Tested for 350+ harmful substances and free from PFAS, toxic dyes, and chemicals that disrupt your body’s natural hormone balance.

Lenzing TENCEL™ Modal

Made from sustainably sourced beechwood and produced in a closed loop system that reuses 99% of water and solvents.

Ethical & Small-Batch Production

Created in small batches with BSCI certified partners to minimize overstock and reduce waste.

OUR GIRLS KNOW BEST

Love Notes

5.0
Rated 5.0 out of 5 stars
Based on 19 reviews
Total 5 star reviews: 19 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
19 reviews
  • PP
    Paige P.
    Verified Buyer
    I recommend this product
    Size Purchased S
    Style(s) Purchased Thong, Bikini, High-waisted Bikini
    Rated 5 out of 5 stars
    4 months ago
    5 Stars

    INSANE SOFT COMFORTABLE

    Fit AdviceRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
  • MR
    Morgan R.
    Verified Buyer
    I recommend this product
    Style(s) Purchased Thong
    Rated 5 out of 5 stars
    4 months ago
    5 Stars

    The go-to panty that tops all others! Perfect for everyone, but a strong contender for the best postpartum panties as well. I was in between sizes, the S thong fit better because it doesn’t move at all. Love love love!

    Fit AdviceRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
  • CM
    Claire M.
    Verified Buyer
    I recommend this product
    Size Purchased L
    Style(s) Purchased Thong
    Rated 5 out of 5 stars
    4 months ago
    5 Stars

    This is the dreamiest thong I've ever worn — no sliding, pinching, or uncomfy riding up. It literally snaps into place when I put it on, and the scoop design detail is super flattering. So far the fabric has held up like new with multiple washes, too.

    Fit AdviceRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
  • KS
    Kayle S.
    Verified Buyer
    I recommend this product
    Size Purchased S
    Style(s) Purchased Thong, Bikini, High-waisted Bikini
    Rated 5 out of 5 stars
    4 months ago
    5 Stars

    Butter in underwear form!! - the fabric is the comfiest thing I’ve ever worn for underwear AND it makes me feel amazing that all the fabrics are sustainably made and non-toxic. Knowing that transparency eases my anxiety and makes me not think twice about throwing them on - also because they are so breathable and comfy that it feels like I’m not wearing underwear! After wearing them for a full day I never felt like they were riding up in the wrong places, rolling or falling down and love that the internal crotch part of the fabric stretches across the whole pair of underwear - that is usually the most annoying part of the underwear I’ve used and I never thought about it this much until I tried Adelfi’s design! I will never turn back!!

    Fit AdviceRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5
  • VV
    Veronica V.
    Verified Buyer
    I recommend this product
    Size Purchased M
    Style(s) Purchased Thong, Bikini, High-waisted Bikini
    Rated 5 out of 5 stars
    4 months ago
    5 Stars

    Love the material and that the gusset looks solid, like it won’t come undone after a few washes like other brands

    Fit AdviceRated 0.0 on a scale of minus 2 to 2
    ComfortRated 5.0 on a scale of 1 to 5