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Alpinestars Summer Tech Performance Sport Boxer

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Summer Tech Performance Sport Boxer

Alpinestars' Summer Tech Performance underwear forms an effective base layer keeping you cool and comfortable under your suit during warm weather riding.


  • Comfortable moisture wicking material.
  • Minimal seam stitching for ultimate comfort and performance.
  • Designed to be 60% lighter than cotton, the construction is also hypoallergenic and antistatic.
  • Muscle supporting compression fit helps support the riders muscles and reduces fatigue.
  • Ergonomic flat lock seams.
  • The underwear is designed to provide a tight, adaptable fit.
  • Moisture wicking technology ensures ultimate comfort is maintained as well as a constant body temperature.
  • Printed Astar logo on the front with Alpinestars print logo on the back.
  • The shorts and pant all feature a male pant opening.

Men's Base Layer Pants Sizing

Euro USA Alpha US Pant Size Waist (cm) Hip (cm) Thigh (cm) Inseam (cm) Height (cm)
42 32 2XS 26 68-72 83-87 50-51 73-74 159-163
44 34 2XS-XS 28 72-76 87-91 52-53 75-76 164-167
46 36 XS-SM 30 76-80 91-95 54-55 77-78 168-171
48 38 SM-MD 32 80-84 95-99 56-57 79-80 172-175
50 40 MD 34 84-88 99-103 58-59 81-82 176-179
52 42 LG 36 88-92 103-107 60-61 83-84 180-183
54 44 XL 38 92-96 107-111 62-63 85-86 184-187
56 46 XL-2XL 40 96-100 111-115 64-65 87-88 188-191
58 48 2XL 42 100-104 115-119 66-67 89-90 192-195
60 50 3XL 44 104-108 119-123 68-69 89-90 192-195
62 52 3XL-4XL 46 108-112 123-127 70-71 91-92 196-199
64 54 4XL 48 112-116 127-131 72-73 91-92 196-199

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 / XS-SM 505444 475289-10-XS/S/29400110 In Stock: Ships within 24 hours
Black / MD-LG 505445 29400111/475289-10-M/L Out of Stock


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 Summer Tech Performance Sport Boxer 4.7 5 3 3
Great product I enjoy wearing these every time I ride. I will purchase more of them, just for spares. The fit is good ( I am 5,9'' and 160 lbs, and I ride an F800gs). They help the most on long rides where I get hot spots on my tail bone. With the addition of these boxers and I have recently changed seats, so i think I have solved the problem! August 10, 2013
Excellent Riding shorts AWESOME! I was not a fan of riding shorts but friend of mine told me to get some. Selected these after viewing your video as a test. I have to say I am now a firm believer in riding shorts. These are nothing short of outstanding. In temperatures above 100 these worked as advertised. Kept the rear cool. Only minor thing is the elastic band could be beefed up a bit but other than that; just a great product. A must wear for any ride. July 9, 2012
Great Shorts!! Airy and dry. I forgot I had them on. Great product!! Airy and dry at the end of 440 miles I forgot I had them on. Once I remembered, I wasn't even in a hurry to get them off either. RevZilla is the bomb! June 4, 2012
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Have a functionality, fit, or otherwise product-specific question about the Alpinestars Summer Tech Performance Sport Boxer? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Alpinestars Summer Tech Performance Sport Boxer
Already Asked: 1 Question, 2 Answers
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RevZilla Store asked: Why did you choose this?
Joshua A: Love the summer tech performance line. Real great cooling and moisture wicking. Also like the compression fit. Thought I'd try out the boxers too. May 26, 2014
Fernando L: I needed something to hold my package a bit better than regular underwear. So far this has done an excellent job! Oct 16, 2013