QUOR Performance Boxer: Fertility-Conscious Cooling Underwear for Sauna

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Founding Member Pre-Order

Ships August 2026

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Size

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$42

$42 each

$110

$36.67 each

Save $16

$210

$35 each

Save $42

$330

$33 each

Save $90

First production run ships August 2026

Mix Your Colorways

Want more than one color? Add single boxers in any colorways you like. Bundle pricing applies automatically in your cart once you reach 3, 6, or 10 boxers.

1 Performance Boxer in your selected size and colorway

Tip: pair with the Vault and a 2-pack of CryoInserts for the full sauna-ready setup.

Men who read the research on heat and fertility and refused to pick between the sauna and the family plan.

Daily wear with the structure to hold a CryoInsert when you need it
Sauna sessions, contrast therapy, and recovery work
Travel: folds flat, dries fast, and cleans up easily
Anyone who has paid attention to what synthetic fabrics do at high temperatures

Body

95% TENCEL Lyocell · 5% elastane.

Plant-based fiber from sustainably managed forests, produced through a closed-loop solvent process. Engineered for breathability, recovery, and softness that improves with wash.

Inner Pouch

100% TENCEL Lyocell.

Certifications

OEKO-TEX Standard 100 certified. Independently tested against more than 1,000 regulated and harmful substances at every stage of production.

CryoInsert Pocket

Integrated into the boxer for use with the BPA-free CryoInsert (sold separately).

Sperm develop best 2 to 4 degrees Fahrenheit below core body temperature. That is why the body carries the testes outside of it, and why a 200 degree sauna erases that margin in minutes.

In a clinical study, healthy men using a sauna twice a week for three months showed declines in sperm count, motility, and DNA integrity, and a meta-analysis of nine studies found large negative effects across every measured sperm parameter. The effects were described as reversible once heat exposure stopped.

Sperm run on a roughly 74-day production cycle, so unprotected sessions this month show up in your numbers all quarter.

The Performance Boxer is engineered around this research: an integrated pouch holds the CryoInsert against a 100% TENCEL Lyocell contact layer and actively cools while you sit.

QUOR is a wellness product, not a medical device, and individual results vary. Read the full research and references on our Science page.

Shipping
First production run ships September 2026. All founding member orders ship in the order they were placed.

Standard shipping within the United States: 3 to 5 business days after dispatch.

Returns
30-day fit guarantee. Open one pair to check the fit; all other pairs must remain sealed. Customer covers return shipping.

Size Exchanges

If your size doesn't fit, we'll exchange it once at no cost on the re-ship; you cover return shipping.

Performance Boxer Size Guide

Between sizes? We recommend sizing up.

Size	Waist (in)	Hip (in)
S	28 - 30	35 - 37
M	31 - 33	38 - 40
L	34 - 36	41 - 43
XL	37 - 39	44 - 46
XXL	40 - 42	47 - 49

Measured flat. For the most accurate fit, measure at the fullest point of your hips and natural waistline.

Meet the Performance Boxer

Every detail designed around one principle: what touches your skin should be as clean as what you put in your body.

01

Made of TENCEL Lyocell
A highly breathable, buttery soft, non-toxic fabric made from natural, raw material wood sourced responsibly from managed forests in Austria.
02

Engineered For Every Situation
Boxer made for all uses - daily wear, high performance activity, and built to withstand high heat environments like sauna.
03

Integrated Pouch for the CryoInsert
Built in pouch to hold the Cryoinsert - A BPA-free cooling ice pack to actively lower scrotal temperature during your sauna sessions.
04

OEKO-TEX Standard 100 Certified
Independently tested and certified free from harmful substances and dyes.