Description
The Summer Skullcap is an ideal way to beat the heat. A mesh upper area promotes breathability beneath your helmet and the stretchy, trim-free headband keeps sweat off your brow with a soft touch.
The Summer Skullcap is available in multiple colors.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Reviews
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5 stars
4 stars
3 stars
2 stars
1 stars
Keeps sweat out of the eyes
Was having trouble this summer riding in Texas. This product definitely works and absorbs the sweat to prevent it from running into your eyes.
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Keeps sweat out of the eyes
Was having trouble this summer riding in Texas. This product definitely works and absorbs the sweat to prevent it from running into your eyes.
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Reviewed 6/19/2025
by CaptainPico
Cycling Enthusiast
Pico Rivera, CA
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Good quality, name brand, pricey even on sale
This has become my go to skullcap for several reasons. First the fit on my head is great as it sits right above my ears when fully stretched out without feeling too tight. I actually don't feel it once I start my rides. It stays cool during hot days and protects my baldish head from sun burn. The combination of a sweat band and mesh keep my face dry from sweat. At first before you break it in its a bit uncooperative when trying to put on. After a few washes it stretches just a bit and becomes easier to put on. I have purchased generic less than equivalents for cheap from Amz but they typically are poor fitting either too big/long and a waste of money. I own both the black and white equivalents to match either my white or black helmets. I am a daily rider and have multiple Castelli Summer Skullcaps so I can ensure I have a clean one available at all times.
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Reviewed 8/28/2025
by Lee
Cycling Enthusiast
Irvine, CA
Value Rating
Overall Rating
Great cap. Comfortable.
Needed a new cap for under my helmet. This Castelli cap fit snug and wicks the sweat better than another brand I was loyal to (Halo). I wil purchase more once on sale again.
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Keeps the sweat off
Wish I had ordered two. I feel cooler when wearing this under my helmet. Keeps sweat from running down my face and glasses
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Reviewed 6/21/2025
by JAZertuche
Cycling Enthusiast
Paradise, CA
Value Rating
Overall Rating
Perfect for warm to hot weather riding!
I have used several forms of under helmet gear and this is best for warm to hot weather riding. I ride 85 to 90 miles a week.
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5 of 5 customers found this review helpful.
Great light cap
My favorite band is Rush. One of their old songs I identify with more and more is I Think I'm Going Bald. If I don't ride with a cap, I get crazy vent tan lines or burns on my skull. This cap does the trick. It's light and comfortable and keeps the sweat out of my eyes. I've had one for a couple of years with no noticeable wear. Highly recommended
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Reviewed 5/22/2025
by Anonymous
Cycling Enthusiast
PDX
Value Rating
Overall Rating
Great for all day riding!
Perfect cap if you dont like the visor and great for early morning chilly rides.
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Reviewed 6/26/2017
by Anonymous
Competitive Racer
Atlanta, GA
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Overall Rating
5 of 5 customers found this review helpful.
Perfect warm to cool weather head cover
I wear this scullcap under my helmet. It is thin, it doesn't bulk up and make the helmet fit tight. Although it is designed for warm weather, I find it helps cut a bit of chill on cool days too. It does not go over the ears. For me, it's a good piece to wear from high 50's through low 70's. Since it does retain a small amount of heat, I tend not to wear the cap when it's really hot, although, it is a trade off from a sun burned scalp (as I'm bald).
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A great summer cap
I have some other skull caps but I wanted one that was white to keep as cool as possible in the summer. I have a giro one that is ok - a little tight and material is thicker so it is a little hot. This bad boy vents well, keeps most of the sweat from pouring down your eyes and is easy to keep clean. Grab it on sale and you won't regret it.
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Head protection
Keeps head from sun burn through helmet or without a helmet.what I was surprised by the skull cap is that it keeps sweat from pouring down my face on the hottest days and my shades don't get messed up!!!! Got two and would recommend. Oh, try wetting it before you take off on a hot day!!!!
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Reviewed 7/12/2024
by Robk
Cycling Enthusiast
New York
Value Rating
Overall Rating
Perfect
For anyone, this skullcap keep sweat and suntan lotion from dripping into your eyes. For bald guys, it has the additional benefit of keeping your head from getting those funny shape sunburn lines.
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Reviewed 10/25/2021
by msknopf
Cycling Enthusiast
New York, NY
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Overall Rating
2 of 2 customers found this review helpful.
Upgrade from headband, keeps sweat off my eyes
Looking for a product to upgrade from headband, which were not doing a good enough job absorbing and wicking sweat during summer rides. Tried a few summer weight skullcaps and found that the Castelli skullcap works the best. Does a great job absorbing and wicking sweat and keeping cool, no longer does sweat build up and run into my eyes as with a headband. Fits well under helmet, like that it covers my bald head from the sun. Tried Giro and PI skullcaps as well, liked Castelli the best.
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Reviewed 8/19/2021
by Greg H
Cycling Enthusiast
Long Island, NY
Value Rating
Overall Rating
Great skullcap
Very comfortable. Wicks away moisture. I will definitely buy another.
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Reviewed 7/6/2021
by nhmtnbkr
Cycling Enthusiast
Nashua, NH
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2 of 2 customers found this review helpful.
Great skullcap
Overall this is a great skullcap for wearing under a road helmet. It catches and wicks sweat very well, even on the hottest of days and long rides exceeding 50 miles. Experienced very little dripping even when sweating up a storm. Fit is excellent and stretches well to accommodate even my large noggin, and it doesn't create pressure points under a helmet, which is rare for most skullcaps. Pretty pricey even on sale for a skull cap IMO, regardless of how good this is.
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Reviewed 6/19/2020
by Bald roadie
new england
1 of 1 customers found this review helpful.
Works well
Keeps baldy from getting sunburnt thru helmet air holes without heating up on long rides. Not as good at keeping sweat out of eyes though.
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Reviewed 6/19/2020
by Joseph
sunny central florida
Very well fit
The skull cap I purchased was well worth the purchase - the cap makes my helmet fit snug and the helmet does not move around as well as providing the sun cover through the helmet holes. I really like the way the cap keeps the sweat from my head off my glasses.
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Reviewed 8/17/2023
by Derekhski
Portland aka Puddketown OR.
Summer happiness
Totally keeps sweat from running into my eyes. Pick up two new ones just before a Marin Headlands trip, temps in the 90's riding around Mt. Tam. Never felt over heated but got the benefit of no sweat running into eyes
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Reviewed 9/6/2024
by EdAudMan
Cycling Enthusiast
Northwest Ohio
Value Rating
Overall Rating
Better than other skullcaps I've used
The cap allows more air to blow through, and less sweat to accumulate while protecting my scalp from sun than my Headsweats caps. But the price is a bit steep.
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Does a good job of minimizing sweat dripping onto sunglasses
I've worn the Castelli skull cap on several high humidity/hot days and it has done a good job of keeping my eyes and sunglasses clear. I think it works best if you place the front of the skull cap above the helmet headband.
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