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Alpinestars Tech Base Underwear Top
  • Alpinestars Tech Base Underwear Top - Black
  • Alpinestars Tech Base Underwear Top - Black

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Alpinestars Tech Base Underwear Top

Alpinestars’ Tech Race underwear keeps you cool and comfortable under your suit during warm weather racing and helps with getting in and out of your suit. 


  • Designed for warm-weather riding
  • Coldtack fabric construction
  • Micro-perforated insert panel for comfort and breathability
  • Ergonomic flat-lock seam construction
  • Compression fit designed to reduce muscle fatigue
  • Printed Astar logo

Men's Base Layer Top Sizing

Euro USA Alpha Chest (cm) Waist (cm) Hip (cm) Arm (cm) Height (cm)
42 32 2XS 82-86 68-72 83-87 51-52 159-163
44 34 2XS-XS 86-90 72-76 87-91 53-54 164-167
46 36 XS-SM 90-94 76-80 91-95 55-56 168-171
48 38 SM-MD 94-98 80-84 95-99 57-58 172-175
50 40 MD 98-102 84-88 99-103 59-60 176-179
52 42 LG 102-106 88-92 103-107 61-62 180-183
54 44 XL 106-110 92-96 107-111 63-64 184-187
56 46 XL-2XL 110-114 96-100 111-115 65-66 188-191
58 48 2XL 114-118 100-104 115-119 67-68 192-195
60 50 3XL 118-122 104-108 119-123 67-68 192-195
62 52 3XL-4XL 122-126 108-112 123-127 69-70 196-199
64 54 4XL 126-130 112-116 127-131 69-70 196-199

Note: Alpinestars sizes displayed on our website are in Euro sizing, use the chart above to convert your standard US size to Euro. 

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full Alpinestars Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Black / SM 304067 475348-10-S/29400074 Available: Expect 2-5 business days lead time prior to shipment
Black / MD 304068 29400075/475348-10-M Out of Stock
Black / LG 304069 475348-10-L/29400076 Out of Stock
Black / XL 304070 475348-10-XL/29400077 In Stock: Ships next business day
Black / 2XL 304071 475348-10-2X/29400078 In Stock: Ships next business day
Black / 3XL 304072 475348-10-3X/29400079 Available: Expect 1-2 business days lead time prior to shipment


Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.


If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
Alpinestars Tech Base Underwear Top 3.5 5 2 2
Must have for Leather Jackets I wear leather year round and wearing a t-shirt under race cut leather makes for amusing times with friends. I always wear a base layer such as this under my leathers(A* Motegi & A* Celer) to make removal easier and to keep me feeling comfortable. I sweat a lot and this base layer makes me feel like I'm not sweating. Its ability to wick sweat helps me feel much cooler than if I were to be stewing in my own sweat. I once decided to skip the base layer and go with just a t-shirt. When we got to our destination, I had 2 friends pulling on each arm of my leather jacket because the sweat made it so hard to remove. We got a lot of strange looks from passerbys. With this base layer, my jacket slides right off. Surprisingly, the base layer doesn't smell after riding. I do hand wash it regularly. October 27, 2014
Good Air Flow Offers good air flow, even when standing off the bike with your jacket/suit off, you can feel the slightest breeze flow through. Could offer more features for its price. September 26, 2011
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Alpinestars Tech Base Underwear Top
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