RUN IT. TEST IT. 30 DAY RISK FREE TRIAL.

Built for high-heat, high-speed racing — stripped to the essentials for serious performance.

Constructed from three precision-cut panels of ultra-lightweight French woven fabric, the briefs move cleanly against the body without weight or drag.

A waistband-free build is anchored by an integrated silicone grip system, locking the fit without pressure. Two bonded rear pockets carry up to six gels with zero bounce.

Designed for fast running, not to be noticed.

Fit

The Marathon Briefs are a precise skin-tight fit for long-distance comfort.

Shipping information

FREE 2-3 day delivery on all UK orders over £120 

All International orders ship with DHL or DPD on a 3-4 day tracked service

International shipping fees, duties & taxes can be found here

Free returns

We offer free returns on all UK orders and most other countries. Changed your mind, wrong size? Simply send it back to us using our no-hassle, pre-paid service.

Secure payments

Shop with confidence. All payments are made with protected connections for maximum security.

Color:
Black
Size:

Fit / Size Guide
  • Black
  • Black
ProtoLab Marathon Briefs
Stripped to the essentials for serious performance.

Moves cleanly against the body without weight or drag.

Features

Run Type

 
Warm-up
 
Recovery
 
Easy
 
Long Run
 
Session/Workout
 
Race

Terrain

 
Road
 
Track
 
Trail

Large rear pocket to accommodate six gels
Silicone grippers for a secure fit
Featherweight fabric
Laser cut hems
Ergonomic three-panel construction

Machine wash 30C
Do not bleach
Do not dry clean
Do not tumble dry

71% PA / 29% EA

The Marathon Briefs are a precise skin-tight fit for long-distance comfort.

ProtoLab Marathon Brief
Designed for fast running.

Stripped to the essentials for serious performance.

Holographic logo
Precision in every detail
Streamlined storage
Securely stows up to 6 gels
Silicone-secured
Locked in place under load and at speed
Fit

Fit Guide

The Marathon Briefs are a precise skin-tight fit for long-distance comfort.

Size Guide

Women's Bottoms Size Guide.

Bust: measure underneath the armpits with the tape measure straight around.
Waist: natural waist measurement is taken from above the hips, close to the navel.

Not quite sure? Please email us at enquiries@soarrunning.com

 

 Size Dress size
Waist (cm)
XS 6 63
S 8 68
M 10 73
L 12 78
XL 14 83