The Underdays x Nimbi Summer Set

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This item is currently available for preorder only.

Delivery estimate is

Free US Delivery over $85

Free US Returns & Exchanges

Two things we believe every summer needs: underwear that disappears on your body, and a shave that actually feels good. We partnered with Nimbi, the women-designed, precision shave brand, to bring you 100 sets, and 100 sets only. Three of our most-worn thongs in new July colors, paired with Nimbi's refillable Body Sculpt Shave Set. Breathable underwear and a smooth shave — the perfect summer duo.

•Three bestselling Everyday styles

•Exclusive Scuba Cloud Pouch

•Ultra-soft TENCEL™ Micromodal

•UNDERskin™: Prebiotics + probiotics infused in the fabric

•Breathable, all-day comfort

•Extra-long gusset

•Adjustable fit

•Holds its shape wash after wash

•Designed for every day

•Fabric: 92% Tencel Micromodal, 8% Elastane

• UNDERskin™: Prebiotics + probiotics infused in the fabric transfer to your skin on contact, supporting a balanced, healthy-looking microbiome. 100% biobased. Powered by HeiQ Skin Care™.

•Waistband: Wide, soft self-fabric, no-dig, no-roll

•Gusset: Extra-long (approx. 2cm wider than standard)

•Leg Elastic: Flat comfortable elastic for reduced VPL

•Sustainability: Our gusset is made from TENCEL™
Modal—sustainably derived from trees and twice as soft as cotton.
Gentle on the skin and made to feel like nothing at all.

•OEKO-TEX certified: All of the fabrics we use are independently
certified by OEKO-TEX, meaning all our underwear is free from
harmful substances.(SH015 210990 Testex)

•Care: To preserve the HeiQ Skin Care™ treatment, wash at 30°C on a gentle cycle. The synbiotic technology is designed to last up to 40 home washes. Data provided by HeiQ based on testing conducted on other materials.
We also recommend to wash your Underdays in a mesh laundry bag. Air-dry flat in a shaded area. Do not bleach. Do not iron or tumble dry.

Standard shipping (3 - 5 working days): $8 / free over $85.
Express Shipping (1 - 2 working days): $28

XS: US 0–2 | S: US 4–6 | M: US 6–8 | L: US 10–12 | XL: US 14–16
Size down for a snugger fit, size up for a more relaxed fit.
Exchanges available if the size isn’t right.

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your underwear deserves better

You care about your skin, your wellness, your rituals. We’re pioneering care for your most intimate parts.

Powered by UNDERskin™

Prebiotics and probiotics, infused into the fabric, transferring to your skin all day. Supports your microbiome. Strengthens your skin barrier. Promotes a healthier appearance. 100% biobased. Developed in Switzerland.

Twice the softness of cotton

Our underwear is made from TENCEL™ Modal—sustainably derived from trees and twice as soft as cotton. Gentle on the skin and made to feel like nothing at all.

Let your ____ breathe freely

TENCEL™ fibers are unfavorable for bacteria growth. They wick away moisture and keep you fresh through the day. Designed to help reduce the risk of unwanted infections.

OEKO-TEX Certified

OEKO-TEX® certified —clean, non-toxic with no harmful substances

Meet Nimbi

Designed by women, for women. Nimbi is on a mission to protect you from anything that can be harmful to you and your environment. Rooted in prioritising skin health, they set out to create a new kind of shavecare that is sustainable, beautiful, and uncompromising in quality. The Body Sculpt Refillable Shave Set is a premium ritual designed by women, for women. This razor delivers engineered precision for a close, comfortable shave. Crafted to hug every curve, it leaves skin smooth and calm. The set contains a 5-blade bio-cartridge crafted from Swedish steel and compostable biomaterial, an ergonomic aluminium handle designed for precision and control, and a glazed ceramic razor stand for elevated bathroom storage. • 100% recyclable aluminium handle • 100% ceramic razor stand • Plastic-free biomaterial cartridge