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Men's Short-Sleeved Base Layer Aerofit 900
Warm, breathable, fitted
Free shipping over $49
Final Sale: No returns or exchanges
Free returns
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Videos
Product Features

Moisture wicking
The fabric absorbs perspiration, keeping your skin dry.
Warmth
This base layer acts as a thermal barrier against the cold.
Stability
Slim fit, made without seams to reduce chafing. Feels like a "second skin".
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Product Customer Reviews

Fits really well, may be a bit longer than expected, but on the whole a good bit of kit.
Excelent baselayer, adds fantastic warmth in any cool conditions, whilst wicking sweat and keeping me dry. Love wearing this.
I have 3 of these, they are excellent value, the 1st one I bought has been washed countless times and is still as new.
A must. you don't feel it when it's on you, Although it keeps you very warm and evacuates well the perspiration. doesn't get soaked like other base layers i have used
As another reviewer has indicated, the body on this top is too short. Perhaps two sizes larger would be ok?
Your comment is duly noted on the length and has been fed back to the product manager. The previous reviewer suggested that when riding the bike that the length is fine. I have checked other sites as well as the UK site and the product is generally well received and is very effective when on the bike.
If the fit is not quite right then of course please feel free to return it to us for a refund/exchange.
Regards,
Peter Lazarus UK Cycling Market Manager DECATHLON
Perfectly good baselayer at a competitive price. It fits well, is nicely warm whilst also wicking well, I've used in both warm and cool conditions and it is fine in either. It seems well made and if it's anything like most 700 series Decathlon stuff will last for a long time and outperform kit that costs twice the price. Only minor complaint is that it is a little short, not an issue once you get on the bike but does look a little off when you're off it.
Very impressed with this. Went for a ride and only realised when I returned home how well it was wicking away the sweat. Fabric is cofortable against the skin as well
I bought this for summer cycling when I didn't want to wear my firm compression tops. This top comes up to the quality of the rest of the Aerofit range really well and has worked on the hot days with excellent wicking properties and it has also added a layer of warmth as the chill starts to come into the morning air.
Vynikající
Super bequem, super Tragekomfort. Habe es in der L bestellt und mir ist es bei 190cm Körpergröße zu kurz, sonst gibt es nichts zu beanstanden.
habe das Shirt als Baselayer bei einem Iltramarathon getragen. Klasse Passform, kein scheuern, nichts. Gleich nochmal gekauft.
schnell trocknend, gut Schweiß absorbierend sowie super Passform
Super Preis-Leistung. Das Shirt ist wirklich klasse. Gerade beim Sport schwitze ich sehr viel und ich bin trotzdem trocken am Körper da die Feuchtigkeit sehr gut absorbiert wird.
Schön eng anliegend und transportiert den Schweiß gut nach außen. Man hat auch nach langen Einheiten nicht das Gefühl das etwas kaltes nasses auf der Haut klebt. Für den Preis Top.
Trägt sich wunderbar
Size Guide

Additional Product Information
Composition
Main fabric
- 97% Polyamide
- 3% Spandex
Breathability
To determine whether a fabric is breathable, we measure its evaporative resistance (test based on standard ISO 11092). The lower its resistance, the more the fabric will let water vapor produced by the body escape, and therefore the more breathable it is. For example: RET <9 = extremely breathable fabric.
Care tips
Machine wash at 86°F. Synthetic cycle. Turn the article inside out. Use a minimal amount of laundry detergent. Do not use fabric softener. Line dry in a warm, ventilated area. Do not tumble dry. Do not dry clean. Do not bleach. Do not place on a heater to dry.
Product tests
Our team of product designers based at the B'Twin Village in Lille, France is continuously working to make cycling more comfortable for our users. Our mission is to create products that meet the specific cycling needs of our users and to eliminate obstacles to a good cycling experience. We then test our products in the field, as we are convinced that only by subjecting them to real world conditions can we continuously improve our products.
Origin
Imported
Product testing
Tested and developed with professional cyclists from the FDJ.fr team.
Superior quality. Unbeatable prices.
For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.
Decathlon makes the difference
-
Research and development
delivers high-quality cost-effective products
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State-of-the-art production processes
minimize manufacturing costs
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Optimized supply chain
reduces retail prices
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Minimal retail footprint
lowers overhead and indirect costs

Men's Short-Sleeved Base Layer Aerofit 900
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.