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Alpinestars Summer Tech Performance Long Pants
  • Alpinestars Summer Tech Performance Long Pants - Black
  • Alpinestars Summer Tech Performance Long Pants - Black

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Alpinestars Summer Tech Performance Long Pants

The Alpinestars Summer Tech Performance Long Pants keep you cool in hot weather by wicking away moisture, promoting evaporation and preventing body heat build up. 


  • 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 rider’s muscles and reduces fatigue
  • Ergonomic flat lock seams
  • 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
  • Features a male pant opening

Alpinestars Men's Base Layer Sizing

Euro Alpha US Pant Size Chest (cm) Waist (cm) Hips (cm) Thigh (cm) Inseam (cm) Arm (cm) Height (cm)
44 XS 28 86-90 72-76 87-91 52-53 75-76 53-54 164-167
46 SM 30 90-94 76-80 91-95 54-55 77-78 55-56 168-171
48 SM-MD 32 94-98 80-84 95-99 56-57 79-80 57-58 172-175
50 MD-LG 34 98-102 84-88 99-103 58-59 81-82 59-60 176-179
52 LG 36 102-106 88-92 103-107 60-61 83-84 61-62 180-183
54 XL 38 106-110 92-96 107-111 62-63 85-86 63-64 184-187
56 XL-2XL 40 110-114 96-100 111-115 64-65 87-88 65-66 188-191
58 2XL 42 114-118 100-104 115-119 66-67 89-90 67-68 192-195

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

How To Measure

C Chest Measure around the fullest part of your chest, under the armpits, keeping the measuring tape parallel to the ground.
W Waist Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.
HP Hips Measure the circumference, from pelvic bone to pelvic bone, at the widest part of your hips below the waist.
I Inseam Measure from the highest point of your crotch down to your ankle, along your inner leg.
H Height With no shoes on, stand with your back against a wall and your feet together. Measure from the floor to the top of your head.
A Arm (Shoulder to Wrist) Standing up straight with your arms at your sides, measure from the Acromion or summit of your shoulder, down to your wrist bone, along the outside of the arm.
T Thigh Measure the circumference of your thighs at the widest point, while in a seated position, with your knees bent to a 90° angle.
Product Style RevZilla Item # Manufacturer Product # Availability
Black / XS-SM 505441 475269-10-XS/S/29400107 Available: Requires 1-5 business days lead time prior to shipment
Black / MD-LG 505442 475269-10-M/L/29400108 In Stock: Ships within 24 hours
Black / XL-2XL 505443 475269-10-XL/2X/29400109 In Stock: Ships within 24 hours


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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.

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Alpinestars Summer Tech Performance Long Pants 3.9 5 8 8
Doesn't fit well An XL is a little too loose on my 34" waist (I got the XL based on other reviews stating the L was too tight on a 34), and too short on my 30" inseam. I can't recommend this product, UnderArmour is a much better value for about the same price. May 24, 2016
Nice product Breaths very well. Makes getting leathers off much easier. It does run on the small side and stretches a lot for those with athletically built lower halves. I'm only 5'6 and the large runs short trying to stretch it over my thighs and calves. October 15, 2015
good product but they run small I've worn these 2-3 times now in temps of the mid 80s under perf leather pants. They feel fine and certainly make it easier to get the pants off after a sweaty ride. They do run small. I'm 5'8", 30" inseam. Bought the M-L and they're just large enough. A bit short. Next time I'll get L-XL June 17, 2014
Great for summer riding & Track I bought these to wear under my leathers at the track and found that they are also great for wearing under jeans when out riding. Just like most Alpinestar gear it runs a bit small, I wear a 34 and got a large and it was still tight. Once I got out riding it wasn't that bad. I would buy these again but next time a size bigger. October 15, 2013
Solid Product I wear these in the Summer. Definitely better than other brands I have tried that could not hold up to robust use. These base layer pants fit on the tight side and so far are holding up really well. I ride every day and rotate 2-3 pairs and have been for over a season now. I do hand-wash them, however, as I don't want to risk sending them through a machine. The material feels nice against your skin and feel very good under your suit. Keep them away from velcro! The minute they touch velcro you will hurt the material peeling them off! I do wish the elastic in the waist was a bit better, but over-all these are very good base layer pants for Summer use and I will be getting more when these eventually wear out. May 15, 2013
Tight !! I can wear medium, had to use X-Large. Very comfortable under leather suit. Tight !! I can wear medium, had to use X-Large. Very comfortable under leather suit. April 22, 2013
A better deal than the matching top While I didn't notice much advantage over a cotton t with the matching top, I definitely found these to be effective and better than some "Comfortech" lightweight longjohns I'd tried under leathers previously. And the price is better than the top, too. Still kinda pricey. They're nice, but not extraordinary. July 18, 2011
Good product for warm weather riders These are really good under leathers for warm/hot days. They breathe well and keep the knees of you pants from binding as the day goes on and you get sticky. The ultra light material is a bit more comfortable than the UnderArmour compression shorts I had been wearing. My only gripe is I'd like to see slightly more robust elastic in the waist - but it's a pretty hair splitting gripe May 10, 2010
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