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Castelli 4.3.1 Gloves
Sale $40.48$89.95 55% Off

Item # CST009J

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Item # CST009J


Harness the power of the mitten.

We could spend hours here at the office debating the pros and cons of various winter glove options available to best meet cold-weather needs. Traditional gloves provide ample range of motion and ease of shift lever function but open up more surface area to chill, while lobster gloves and mittens provide superior warmth and toasty hand feelings but leave limited finger mobility. Castelli silences the debate with the 4.3.1 Gloves. Castelli takes the best of both the glove and mitten worlds, mashes them together, and spits out a ridiculously versatile piece that should have a home in every cyclist's winter accessory collection.

Fashioned from windproof, waterproof materials with a kitten-soft fleece lining, these gloves are meant to keep hands cozy. With a convertible mitten design, riders can choose their warmth level for the day. Opt for a full mitten when it's extra cold, a three-finger mitten to leave an index finger free for easy gear shifts, or pull back the mitten cover and rock the 4.3.1s traditional glove-style when things warm up a bit.

Silicone grippers on the fingertips and thumbs ensure they won't slip off the bars or brake levers even through rainy, icy days. Long wrist cuffs tuck neatly under or over your jacket cuffs and cinch down securely with hook-and-loop strap closures to seal out chilly wind gusts and errant flurries, ensuring toasty wrists and digits throughout the ride.

The 4.3.1 Gloves feature minimal padding on the palms to enhance road feel, while microsuede panels on the thumbs let you quickly mop away sweat and snowflakes on the fly. As a final touch, Castelli adds reflective print to increase visibility to motorists, fellow riders, and wandering neighborhood pets in low-light or dreary conditions.

Tech Specs

[liner] Polartec PowerStretch fleece
hook-and-loop strap
Claimed Weight:
98 g
Recommended Use:
Manufacturer Warranty:
1 year

Size Chart


Hand Circumference <7.2in
7.2 - 8in
(18.4 - 20.3cm)
8 - 8.7in
(20.3 - 22.2cm)
8.7 - 9.5in
(22.2 - 24.1cm)
9.5 - 10.2in
(24.1 - 26cm)
Hand Circumference <6.5in
6.5 - 7.2in
(16.6 - 18.4cm)
7.2 - 7.9in
(18.4 - 20.2cm)
7.9 - 8.7in
(20.2 - 22cm)
How to Measure:
Measure around the widest part of your hand, excluding the thumb.

Reviews & Community


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Review from Sam

  • Familiarity: I've used it several times
  • Fit: True to size

The Castelli 4.3.1 Gloves have an issue with the pinky finger pulling out and then when i put my hand back in, the finger is jammed. i have to take a pen or stick to push it back through. i would also size up on these babies to fit a little less snug.

If you have any questions about this or any other gear shoot me an email at or give me a call at 801-523-4053

I used them 2 times and have the same problem, the inner lining has something wrong, it’s a pity because the rest of the glove it’s perfect in terms of protection

Great protection, slightly bulky

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

I used them this weekend and they are great in terms of cold and wind protection ( no question at all), the only point to consider is that they’re slightly bulky (maybe and mostly due the inner liner that the sewing makes them not perfect)

hey David, have you got a chance to try out the waterproofness or lack of it?


Hei Wowiiode, sorry to come this late with an answer, I haven’t try them on the rain, but wind protection it’s really good, after couple of times the inner lining feels a little bit weird (at least with the pair I got)

Great, convertible gloves

  • Fit: True to size
  • Size Bought: Large

I used to own a thin pair of Pearl Izumi gloves that had a wind proof layer that could convert to lobster gloves. The Castelli glove gives you a lot more flexibility as to how many gingers you want exposed. I love them. A little thick, so only good for winter. Fits like .... Wait for it .... A glove.

I'm a little confused. Do your fingers go in the regular glove fingers, even with the mitten cover? Seems like that defeats the purpose of the mitten, which is to keep your bare fingers close together for max body heat. ???

The mitten cover goes over the regular glove fingers. What it does is keep the wind off your hands so they stay warmer. It works.

It covers your fingers just for wind control and it works


  • Familiarity: I've used it several times
  • Fit: True to size

These are great gloves. I've worn this down into the 30's with no issues. They are quite adaptable and wide range. The ability to add the additional wind block is genius. Great dexterity for shifting, nice feel of the bike. They are sealed up to prevent any any incoming cold air ingress (a classic problem with bike gloves).

My only complaint is that they are a little long in that they come up quite far over the wrist and can get in the way of jacket cuffs etc...

Hi John. Do you think you'd be able to wear these in even colder temps w/a liner and be comfortable?

Boy, that's a hard one. Everyone has a different tolerance for cold. They are a fairly close fitting glove so a liner might be tough. A silk liner would work though.

Also depends on what "colder" means to you. I ride up here in Minnesota so what passes for cold up here is going to be very different than someone down in Texas. I can wear these down into the thirties with no problems, down near thirty or slightly lower if I'm working hard. At upper 40's these are too warm for me.

Thank you for the reply. I'm in Chicago and ride through the winter... I can get away with less on my hands than my SO, so I know what you mean.