CYCLING APPAREL ENGINEERED IN SWITZERLAND
Ascender System X1 Baselayer
Ascender System X1 Baselayer
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Engineered for next-to-skin performance in warm and high-intensity conditions, the System X1 Baselayer combines ultralight breathability with a stable, race-oriented fit.
Constructed from a highly breathable open-knit fabric with light compressive support, it promotes continuous airflow and rapid moisture evacuation during hard efforts. Soft-contact finishing at the collar and arm openings reduces friction and pressure in sensitive areas, while the shortened silhouette minimizes excess fabric beneath bib shorts for a cleaner on-bike fit.
Finished with a minimal reflective grey Ascender logo, the System X1 reflects a clean and technical approach to modern cycling apparel, designed for comfort under demanding riding conditions.
Product Features
Product Features
Fabrics
Fabrics
Care Instructions
Care Instructions

Men Size Chart
Use the measurements below to find your size. If you’re between sizes, choose the smaller for a tighter fit or the larger for a looser fit. If chest and waist suggest different sizes, follow your chest measurement.
For personalised advice, contact our Customer Service team at info@ascender.cc.
HOW TO MEASURE
Chest (A) and Waist (B) for Jerseys
Waist (B) and Hips (C) for Bib Shorts and Tights
Followed by the detailed table and instructions below.
| Size | Chest (A) (cm) | Waist (B) (cm) | Hips (C) (cm) |
|---|---|---|---|
| XS | 84 - 89 | 69 - 74 | 84 - 90 |
| S | 89 - 94 | 74 - 79 | 90 - 96 |
| M | 94 - 100 | 79 - 85 | 96 - 102 |
| L | 100 - 108 | 85 - 91 | 102 - 108 |
| XL | 108 - 114 | 91 - 98 | 108 - 114 |
| XXL | 114 - 122 | 98 - 107 | 114 - 120 |
CHEST (A)
Measure around the fullest part of your chest, keeping the tape measure horizontal.
WAIST (B)
Wrap the measuring tape around your torso at the smallest part of your waist, typically 2.5 cm above your belly button (natural waistline).
HIPS (C)
Wrap the measuring tape around the widest part of the seat.

Difficulties finding your size? Please refer to the size guide in our website footer (Customer Service) or contact us at info@ascender.cc.