The String Nix Edit — comfortable thong

String Nix model wearing white organic cotton string thong underwear for National Underwear Day 2026

National Underwear Day 2026, Time to Upgrade Your Everyday Underwear

It is National Underwear Day, the perfect excuse to rethink what sits closest to your skin every day. Better fabric, better fit, less bulk and underwear you genuinely want to wear.

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Woman reclining in a cream sweater and white string thong.

The Most Comfortable String Thong You’ll Ever Wear

A comfort first guide to finding the most comfortable thong underwear, with soft organic cotton, a barely there feel, no VPL fit, and everyday wearability.

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String thongs in neutral shades arranged beside a fashion magazine.

A Guide to Sustainable Underwear

From organic cotton and certifications to thoughtful design and everyday wearability, this guide explains what sustainable underwear really means and what is worth looking for.

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Woman in cream Pilates wear seated beside a reformer machine.

What Is the Best Underwear for Pilates?

From no VPL dressing to comfort and staying power, here is what makes the best underwear for Pilates and why many women choose a smooth string thong underwear style under Pilates leggings.

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