Home Page

Cart, contains 0 items

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Expert Help
Earn Rewards
  • Just In
  • Learn

Prima Short - Women's

4.166666666666667 out of 5 stars
6 Reviews
Color:Black/Dark Gray


Size Chart


Why We Like The Prima Short

Castelli sets a high standard when it comes to performance cycling apparel, and the Prima Shorts receive comfort and elite-level design at an affordable price-point. Shorts with a bib-design are common in form-fitting cycling bottoms, however, shorts offer an appealing versatility that removes the hassle of controlling and concealing bibs, whether in spin-class or on the open road—not to mention decluttering nature-breaks. Castelli's Pro Dry Soft Lycra form-fits and supports during your most intense workouts, and as the temperatures rise, sweat is efficiently wicked away to help you finish strongly.

Castelli brings high performance to the Prima's chamois as well with the KISS AIR2 and an updated top-cloth for all-day softness and comfort. Giro3 leg grippers keep the shorts in place during sprint efforts, and the reflective details add low-light visibility as you chase the sunset.


  • Uncompromising performance at an entry-level price point
  • Updated Pro Dry Soft fabric cools and dries quickly
  • Performance chamois with soft top-cover adds comfort for all-day riding
  • Supportive fit is sleek without being compressive
  • Sewn-on reflective patches for low-light visibility
  • Item #CSTZ7BC
Pro Dry Soft Lycra
spring, summer, fall
[medium] 8.5in
Leg Gripper
Claimed Weight
[medium] 5oz
Manufacturer Warranty
1 year

Overall Rating

4 based on 6 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 3 reviews
5 Stars - 2 reviews

Fits Slightly Small

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


Selecting an option will reload the available reviews on the page
5 out of 5 stars

June 21, 2024

Buying another pair

I've put it through the wringer
Size Bought:
5' 6"

I tend to like Castelli shorts, but not all work for me. I tended to buy free aero shorts. These are just as good. I am not rail thin. I have a female cyclist's body. I ride a lot.

Deborah L
3 out of 5 stars

October 11, 2021

Squeaky Seams, Tight Waistband

I returned this product before using it
Size Bought:
5' 4"

The castelli chamois is so nice, but the waistband is just too constrictive. I have a 28 inch waist and ordered a M, which should've given me plenty of clearance, but there was no chance. I couldn't stand being in these longer than 30 seconds. Also, no one seems to be mentioning how squeaky these are. Like any leg movement causes the seams to squeak--I think it's the reflective material on the back that's doing it. Not something I've ever encountered before...

Laura E
4 out of 5 stars

June 15, 2021

Worried about the seams

I returned this product before using it
Size Bought:
5' 7"

Sized up per previous review. Overall I love these shorts, the fabric, waistband, leg grippers and chamois are awesome and super comfortable. The catch is that the seams on the backside of the shorts are not flat, and just with trying them on they were a bit uncomfortable. I fear they would rub on long rides. Sadly, I will likely be returning these.

4 out of 5 stars

March 18, 2021

Nice but odd fit

I returned this product before using it
Size Bought:
5' 4"

I sized up as recommended and the shorts fit comfortably around the waist, upper thighs. They seem well made. However, the band/leg gripper is way too loose. I can't tell if this particular short is defective or if this short is really made for taller women. I'm 5'4.

Maria G
5 out of 5 stars

January 4, 2021

My new favorites but run small.

I've used it several times

I sized up after reading the other reviews and it was a good thing that I did. I normally wear a small in Gore but ordered a medium and they were perfect. 5?8? 125 pounds. The chamois Is perfect for me. According to their size chart I should have ordered a small but the medium was perfect.

Paula W

Originally reviewed on Backcountry.com

4 out of 5 stars

December 7, 2020

lovely shorts

Size Bought:
5' 6"

5'6" 120 lbs. 100+ miles/ week. These shorts should be great, as the fit is perfect. Ordered 1 size up as I am normally a small in other manufacturers. The narrowness in the front part of the chamois is a nice advantage as too much chamois seems to be the case for most shorts and I don't tolerate a lot of bulk in the hot summer months. Typical, excellent Castelli quality.

Daura H