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Alpinestars Summer Tech Race Undersuit
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Alpinestars Summer Tech Race Undersuit

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. Available as a 1-piece undersuit or as separate top and bottom.


  • Designed for warm weather riding
  • Coldtack fabric construction
  • Micro perforated insert panel for comfort and breathability
  • Ergonomic flat lock seam construction
  • Compression fit design to reduce muscle fatigue
  • Off-set main zipper closure
  • Printed Astar logo
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Alpinestars Summer Tech Race Undersuit 4.8 5 21 21
Second Skin That's what it feels like when you have this undersuit from A Stars on! I didn't give it a high rating for protection et features as it isn't really applicable but the moment you put it on you actually feel cooler, it's a funny feeling to actually put something on, on a warm day et feel cooler. The zip is set off to one side as you do it up so that's a good feature as it's not right under your suit zipper. It's silky smooth et very light, you would hardly know you're wearing it ... a definite recommend for the $$ January 6, 2014
I like it Good for hot weather , very comfy , fit size, very useful December 23, 2013
Nice addition Makes for a great undergarment for leathers. Used it for a few hot track days and it works well. October 3, 2013
Awesome Product! The Alpinestars Summer Tech Race Undersuit is an awesome product because it actually does what it is supposed to. The material offers enough compression to provide support to your limbs and help reduce fatigue as well as offering a generous amount of air to pass through and cool you down on summer rides. I am 5' 8" and 140lbs, so the Small size fit me perfectly. I wear this with the Alpinestars Motegi suit (size 48) and the perforated leather works well in conjunction with the undersuit to make riding with leather bearable in 90 degree weather. July 15, 2013
Works as listed I bought this for my first track day, a two-day California Superbike session in 100 degree Utah heat. It worked great and was easy to wash and dry overnight. July 13, 2013
XL fits 6'4" 180-200 lbs Amazing product and business to purchase from. got one for me and my brothers birthday (who also rides) and we love it because it's snug and tall enough for us to fit. Zipper is cross the chest Anna makes it easy to get into and out of when you're all sweaty. keeps you really cool too. Thanks for the excellent customer support! June 24, 2013
Perfect This second skin is wonderful. Lightweight, comfortable. helps to wear the suit. Not to mention that is very hygienic. It is my second purchase of this second skin and I recommend. March 18, 2013
Good product for a good price I got this to wear under my racing suit and it's worked out very well. I've rode in 80 degree weather and this suit keeps me dry even when I start to sweat. I really like that the zipper unzips from the top or bottom, this feature comes in very handy. My only critique of the suit is that it seems to sort of bind up on my knees. I have a Dainese Avro 2-piece suit, and the undersuit seems to grab the inside of it at my knees as I move around on my bike. Not a big deal, but I'm hopping it'll smooth out a little after wearing it for a while. January 20, 2013
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Alpinestars Summer Tech Race Undersuit
Already Asked: 7 Questions, 26 Answers
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RevZilla Store asked: Why did you choose this?
Alejandro m: Hot weather/track days riding Apr 13, 2014
John P: Essential gear if you want to move easily on the bike - prevents hanging up on your suit/ Apr 7, 2014
Craig G: Good reviews, looked like the right choice. Mar 25, 2014
Lorena G: Excelent summer gear. Also to use at Gym as a baselayer under shorts and T-shirts. Nice style and Astar reputation. Mar 18, 2014
Bruce H: I purchased an Alpinestars race suit and was told these undersuits where the way to go and they where right certainly makes getting in or out much easier plus the breathability makes it much more comfortable. I had purchased some inexpensive shirts that theoretically was similar NOT. This suit is well made and very comfy a definite recommend. Mar 6, 2014
Eryk F: no more availability on europe :/ Mar 2, 2014
M A: To make track days more comfortable and less "sticky" Feb 21, 2014
Allen C: Since I have all leather gear now, I'll want something that can fit smoothly & snug underneath all the leather that I'll be wearing. Not to mention something that will help keep my body cool while under all that leather. A lot of good reviews about this product, I don't think i will be disappointed when I get the opportunity to try it out for myself. Alpinestars has yet to disappoint me so far. Jan 3, 2014
David H: Alpinestars rocks Aug 10, 2013
A shopper asked: Aloha! Which size would you recommend for the Alpinestars Summer Tech Race Undersuit to wear on track days? I'm 5'8", 190lbs, 40 inch chest, 36 pant size and 30 inch inseam. I'm looking for a suit to provide proper compassion, but without restricting my breathing when in a tucked position.

Apr 10, 2014
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Robert B: I'm 5'11" 150s 33" inseam and I were a size medium. It is suitably snug without binding. The material is very stretchy but is lighter than a lot of the compression clothes I wear cycling. I suspect a large would be called for, although the legs might be a bit long. Probably not an issue because the material is stretchy and comfortable against the skin so a little bunching at the bottom wouldn't matter. You definitely want the undersuit snug so it helps you slip on your leathers without binding. This one does that very well Apr 11, 2014
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John P: You gotta go large and then maybe hem up the ankles

I am 150 # 5' 10", waist 33" & medium is tight all over for me, I have a size large also for when my weight (in the gut) goes up to 170 / waist 36.

I like these nylon/lycra suits - they allow easy movement underneath riding clothes / suits.

Bodyglove (I think) makes a similar suit for under a wetsuit. Alternatively, buy slippery separates. Underarmour and Nike make compression clothing in synthetic materials.
Apr 11, 2014
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Todd W: The under suit is very Flexible and not restricting. I would be concerned with being tight. I am 6ft, 220, 36 waist, 46 chest and the large fits fine. I alternate between this suite and a RS Taichi version. It really help getting in and out of a full leather suit. Apr 11, 2014
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DAINESE U: you're going to have to try either a size M or a size L
I'm same hieght, but weight is probably 175lbs. and wear 30 inseam jeans and 34 waist. and size M fits me perfect.
Apr 12, 2014
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A shopper asked: To whom it may concern,
Not sure which would be the correct size undersuit for me?
Im 180cm's tall and weigh 154 pounds.
My chest size measures 38 inches or 97 cm's
Which size undersuit would best fit me in the Alpinestars Summer tech suit.
Yours Sincerely
Ion Siskamanis
Jan 19, 2014
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Anthony K: I bought size medium suit last riding season. I like the suit very much. As for size, I'm close to the same weight and chest as you but about 6 inches shorter than you. For me, the medium suit's arms and legs are about 5-6 inches longer than I'd like them. For your 73 inch height, the medium suit should fit great. Jan 24, 2014
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Pete W: I'm 177cm tall, 40" chest and 175lb ... I got a medium and it fits great, I would go medium if I was you, if you go large I think it would be a little on the baggy side. I'm only 3cm shorter than you and I don't think that would be anything on these suits as they are pretty stretchy :-) Jan 28, 2014
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Ronald B: Ion,
They do seem to run small. I got a size large. I'm 69" tall and 165 lbs. Chest 40" waist 33". I would get the large due to your height, but if you want a snug fit medium should work for you.
Jan 23, 2014
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John P: Probably medium - tight fit Jan 24, 2014
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Allen C asked: I was wondering because I can't tell from the picture but even though the description says that this suit is also available as a 1-piece, does that mean that the top and bottom of this suit are detachable to make the top by itself and the bottom as well? Or is the 1-piece option a completely different product on it's own page? I'm a little confused. Dec 25, 2013
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Carlos G: The option you see in this page is a 1 piece only. You can buy the top and the bottom separately through other pages. Great product by the way. Dec 25, 2013
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Josh A: This is a single piece with one zipper coming up the chest at a slight angle. Dec 26, 2013
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DAINESE U: Its one piece suit, you can't detach the top from the bottom. Dec 25, 2013
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Allen C: Thank you all! That helps a lot. Dec 26, 2013
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Alejandro m asked: What size do you recommend, I use a Dainese 52 size race suit which fits ok (maybe a bit snug on upper body and loser on bottoms and legs)? Mar 9, 2014
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Ahmad S: I would recommend a size medium if your suit size is 52. The base layer should be tight, this helps ease muscle aches during long hours on the bike. Its a great cooling material easy to slip on and off. Mar 23, 2014
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John P: All of these suits are a tight fit for an athletic build, so you slip around easily inside your riding suit. Unless you are racing, I'd say go up a size for comfort. Mar 10, 2014
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A shopper asked: my euro sizing is 42 and my body is an average (male), can you tell me which size will fit me? thanks Oct 16, 2011
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PeteFLUSA: 42 Euro sizing? I assume since you mention your body size that you are talking about race suits. My friend is 5'7" (170cm) 135 lb (62kg) and he is 50-52 in Euro Race Suits (40-42 US). I am 6'1" (185cm) 170 lb (77kg) and I wear 52-54 in Euro Race Suits (42-44 US). Most suit sizing charts seem to run a bit large, so we look for the nearest value, and purchase down a size.

If you have a accessible (nearby) motorcycle shop that sells race suits, go in and try a few on. Experts have told me that the suit should fit snug, and standing upright difficult as these were meant to fit those in a seated position. When trying the suit, make sure to emulate the riding position with the suit on, and make sure you can twist to the right or left with your trunk and with your legs. Again, the suit should be snug, but not restrict movement.

Tall people like me can make up for sleeve and inseam deficiencies by purchasing higher boots and longer gloves. If you are shorter, you may wish to try your typical riding gloves and boots with the suit on, just to make sure that the material does not bunch inside the shoe or glove, preventing proper closure.

I hope this is helpful!
Jan 3, 2012
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AliB: I would recommend a size Large based off the information you provided. If you could provide us with actual measurements, we can make a more accurate suggestion. Chest, Waist, Hip and Inseam would be the measurements we need to provide an accurate suggestion. Nov 3, 2011
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Aldo B asked: Hi, I have a 52 race suit, I am 175 Cms high an d weigth 71 Kgs what size should I buy? Mar 18, 2014
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Bruce H: well im 6ft and 175lbs and I got a medium you weigh a little less so I would go with the small Mar 18, 2014
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