Yes, and many racers do exactly that. Speed suits fit tightly and leave no room for layer adjustment, so a one-piece base layer provides consistent warmth without the risk of a top untucking or a gap forming at the waist. Look for a slim-fit, lightweight or midweight suit with flatlock or bonded seams to minimize bulk under the speed suit. Compression-style one-piece suits are also popular among racers.
Ski Underwear · One-Piece Base Layer Suits
Can I wear a one-piece base layer under a ski racing speed suit?
Related gear types
If this answer nudged you toward a different style, these guides compare specs and trade-offs.
Midweight Base Layers
$35 – $130
Versatile, moderately insulated base layers that are the most popular choice for typical winter skiing conditions.
moderate insulationgood breathabilityeffective moisture wicking
Heavyweight Base Layers
$45 – $160
Maximum-insulation base layers designed for extreme cold, low-activity skiing, or cold-sensitive individuals.
thick fabric constructionhigh insulationbrushed or fleece interior
Merino Wool Base Layers
$50 – $200
Premium natural-fiber base layers prized for odor resistance, temperature regulation, and next-to-skin comfort.
natural odor resistanceexcellent thermoregulationsoft next-to-skin feel
More questions
- How do you go to the bathroom in a one-piece base layer suit?
- Are one-piece base layer suits too warm for spring skiing?
- What if the suit fits my torso but is too long in the legs (or vice versa)?
- Do one-piece base layer suits work for snowboarding?