Everything below is about the no show socks. If your question is not answered here, email us at support@shopundercurrent.com and we will add it.
Do these actually stay on?
Yes, and it is the one thing we would ask you to judge us on. The usual failure in a no show sock is the heel sliding down and bunching under your arch by the middle of the day. The whole product was designed around preventing that. If yours slip, we will refund or exchange them for free.
How do they stay on?
Two things work together. The sock is cut and sewn from a cotton and modal fabric, so the heel is shaped to the back of the foot rather than knit as part of a single tube. Inside that heel is a silicone grip.
On a typical knit no show sock, the grip is asked to hold a heel that was never shaped to fit, so once the fabric relaxes the sock starts to travel. Ours starts from a heel that already sits where it should, and the grip keeps it there.
Which cut should I wear with my shoes?
Low-Cut is for ballet flats, heels and other shallow shoes. Mid-Cut is for loafers, boat shoes, sneakers, clogs and slip-on shoes. High-Cut is for dress shoes, and for sneakers with a tall or padded collar.
If you want to browse by shoe rather than by cut: loafers, ballet flats, heels, dress shoes, sneakers, clogs and slip ons.
Will they show above my shoes?
The Low-Cut is the lowest of the three and is the one to choose when staying out of sight matters more than coverage. In September 2026 we widened its front opening by 0.6 inch so it disappears in more shoes, without changing how the heel holds.
What size should I order?
The no show socks are sized by shoe size rather than by gender. Low-Cut runs S through XL, and Mid-Cut and High-Cut run S through XXL. S fits US women 5 to 6.5 and US men 3.5 to 5. M fits US women 7 to 9 and US men 5.5 to 7.5. L fits US women 9.5 to 11.5 and US men 8 to 10. XL fits US women 12 to 14 and US men 10.5 to 12.5. XXL fits US women 14.5 to 16 and US men 13 to 14.5. The full chart, including EUR sizes, is on the size chart page.
What are they made of?
45% cotton, 45% Lenzing™ Modal and 10% spandex, with a silicone grip inside the heel.
How should I wash them?
Machine wash cold and tumble dry low.
What colors do they come in?
Five colors: Almond Beige, Midnight Black, Toffee Tan, Espresso Brown and Pristine White. Multipacks also come as Basic Mix, Neutral Mix and All Color Mix.
What pack sizes are there?
A single pair is $10, the 3-Pack is $28, the 5-Pack is $45 and the 10-Pack is $80. The 5-Pack and 10-Pack are available in Low-Cut and Mid-Cut.
Are they for men or women?
Both. Every pair is unisex and sized by shoe size. The size chart converts between US men, US women and EUR.
Can I return or exchange them?
You have 30 days from delivery to request a refund or a free size exchange, and if your socks slip, we will refund or exchange them for free. Email support@shopundercurrent.com to start one. Orders placed between November 1 and December 14 can be returned until January 15. The full details are in our return policy.
How much is shipping?
Standard shipping is free on orders of $69 and over.