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Diluvio Ul Shoecover

4.444444444444445 out of 5 stars
9 Reviews


Size Chart


Why We Like The Castelli Diluvio Ul Shoecover

The Diluvio UL combines the best features of previous Diluvio shoe covers into one model that works well for any cycling discipline. They're constrcuted from 3mm neoprene with sealed seams to provide warmth and water protection, and feature a bottom opening that accommodates road, gravel, or MTB shoes. A redesigned cuff offers a more comfortable fit and better protection against the elements.


  • Lightweight, sturdy shoe cover for any cycling discipline
  • 3mm thick neoprene keeps your feet warm and dry
  • Sealed seams prevent moisture from seeping through
  • Bottom opening works with road, gravel, or MTB shoes
  • New cuff design for improved fit and weather protection
  • YKK zipper makes them easy to get on and off
  • Recommended by Castelli for 36 - 57 degrees Fahrenheit
  • Item #CSTZ7E9
3mm neoprene
zipper, hook-and-loop
Claimed Weight
Manufacturer Warranty
1 year

Overall Rating

4.5 based on 9 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 2 reviews
4 Stars - 1 reviews
5 Stars - 6 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?


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3 out of 5 stars

November 20, 2023

Run small and narrow.

I returned this product before using it
Size Bought:
5' 2"

They are warm, have great construction and look like they will be very durable. They fit snug around the shoe and was able to slip them in without much trouble. However, I was not even able to zip them all the way up because they are extremely narrow at the top. For reference, I wear a 38 in European size and I'm petite built.

Maria M
3 out of 5 stars

January 13, 2023

Warm, but runs very small

I've used it once or twice and have initial impressions

The Good: These were a Christmas gift. I used once in 32*F dry & sunny conditions and my feet stayed warm on a 4 hour ride. The Bad: These are extremely undersized. I wear size 10.5 dress, 11.5 -12 hiking / trail running shoes. I purchased XXL. They stretched enough to wear, but will likely tear as a result. attached pic is adjacent to size 11.5 running shoe

user image
Onquest1082472 O

Originally reviewed on

5 out of 5 stars

January 11, 2023


I've used it several times

Got these for Christmas and love them. Keep my feet warm and dry on these cold and sometimes damp days of winter riding.

Jerry B

Originally reviewed on

5 out of 5 stars

March 12, 2022


I've put it through the wringer

These run a tad small in my opinion. They however are fantastic at keeping your feet warm and dry! These are definitely a keeper and spreading the word!

Mandy M

Originally reviewed on

4 out of 5 stars

January 28, 2022

Warm, sturdy, absorbent

I've used it several times

These are perfect for riding in temperatures in the 30s and 40s F (and high 20s windchill). Paired with wool socks, my usually extremely cold toes only feel a slight chill at the lower temperature end. They may resist a little water, but I've found them to be mostly absorbent of water. I rode them in rainy conditions in the mid 40s and the first puddle I rode through saturated them. Nonetheless, my completely soggy feet did stay warm for the rest of the rainy ride. I've also noticed a slight dampness from riding through a puddle or two, and they won't dry out on their own without placing them on my PEET dryer overnight. I bought the S/M and can fit them on my EU40 and EU41 (barely) shoes.

Lisa H

Originally reviewed on

5 out of 5 stars

January 18, 2022

Your feet will thank you

I've used it several times
Size Bought:
5' 9"

I try to ride my bike all year, even if in the winter I am doing hills on the road. Unfortunately once my toes started to go numb and freeze I had to stop. These shoe-covers solved that issue for me. My feet never felt cold, I do clipless and had no issues with the covers and clipping in and out. I even crashed and they were durable and I just slipped them back on. I have had water splash on my feet and they still kept them dry and allowed me to keep riding without any discomfort in my feet from the elements. I purchased SIZE : L/XL - I wear a size 10.5 and it wrapped nice and tight around my mtb shoes

Christopher R
5 out of 5 stars

January 14, 2022

Big improvement for cold feet

I've used it several times

I would wear these at about 55-60deg and below but my feet are always about 10 deg colder than the rest of my body and are chronically cold. At the higher end of this range I notice that my sweat is getting trapped some in the boot and as I take them off it's a little wet. With that said I don't think the moisture has caused me any problems or made my feet any colder. I have a size 46 shoe and the L/XL fit great. At 30deg my feet still went numb but it was a huge improvement over anything else I've tried. Highly recommend.

Michael C

Originally reviewed on

5 out of 5 stars

March 20, 2021

Fantastic covers - saved my toes

I've used it several times

These are great for those cold and windy mornings. They keep my toes nice and warm, while the rest of my body is freezing. Highly recommend them for those 55F and below days... maybe even 60F.

Genc I

Originally reviewed on

5 out of 5 stars

February 25, 2021

Love this shoecover

I've used it several times

I use this shoe cover for my road bike ride on the 50s degree. It is perfect to keep my feet warm but my feet will be sweating after a 40 mile ride. Very easy to put them on and off but just to make sure wear them first before your shoe.

Kelvin C

Originally reviewed on