Men's Alpha Merino Air Jacket

17 reviews

+ Free shipping

& Returns



Cool to cold, primarily dry conditions when light weight and breathabiliy are the priority.


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The Velocio Signature Guarantee underscores our mission to create a better cycling experience. We believe that riding in our gear is the best proof of our commitment to quality and performance. Therefore, we stand behind everything we make. Try any of our products for 30 days to ensure it meets your needs. Wear it. Ride in it. Wash it. We believe it will provide a better riding experience. If you are not 100% satisfied with your Velocio product, you may return it within 30 days of receiving the product.

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    Using the latest and most advanced version of Polartec’s renowned Alpha insulation, by adding merino wool, the Alpha Merino Air jacket punches way above its weight in terms of warmth, breathability and performance. Alpha Wool is used as interior insulation on the sleeve, front and collar, while Pertex Quantum Air provides an ultralight wind and water resistant barrier to help trap heat while maintaining class-leading breathability. The back panel of the jacket is made from fleece-backed italian milled recycled polyester to aid in breathability and mobility.

    Likely our most technical riding jacket ever, the Alpha Merino Air uses our proprietary 3D patterning and carefully engineered on-bike fit for a super streamlined fit and covering a wide range of temps and conditions.

    "Velocio's Alpha Merino Air Jacket might just be the best winter jacket we have tried."
    - Dan Chabanov, Bicycling

Velocio Men's Alpha Merino Air Jacket

Velocio Men's Alpha Merino Air Jacket


Sizing Guide

Our jerseys and bib shorts are intended to be form fit, providing compressive support, maximizing performance of the fabrics, and reducing fatigue and chafing. Due to the compressive nature of the fabrics, you will be able to fit into more than one size. Please use the charts below to help determine your optimum size:

  • Find your weight along the top of the table.
  • Look down the column to find your appropriate size.
  • Each size has a height range based on weight.
  • If you find that you are on the upper or lower end of height and weight for a given size, the garment will have more or less compression respectively.
  • Use the Dimensions Details chart to further dial in your fit.

Still unsure or need help? No problem! Email us at Remember that every piece is backed by our Signature Guarantee.

Height & Weight Size Ranges

Our sizing chart represents the majority of riders we’ve worked with first hand in our clothing. If your size falls outside of the specified chart, please contact customer service for insights or take advantage of our Signature Guarantee which allows for testing and return within 30 days if your riding experience, including fit, isn’t improved.

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  • Size 120 - 130 lbs. 130 - 140 lbs. 140 - 150 lbs. 150 - 160 lbs. 160 - 170 lbs. 170 - 180 lbs. 180 - 190 lbs. 190 - 200 lbs. 200 - 210 lbs. 210 - 220 lbs. 220 - 230 lbs. 230 - 240 lbs. 240 - 250 lbs. 250 - 260 lbs. 260 - 270 lbs. 270 - 280 lbs. 280 lbs +
    XS 5'3" 5'8"
    S 5'5" 5'11"
    M 5'9" 6'4"
    L 5'9" 6'5"+
    XL 5'9" 6'5"+
    XXL 5'9" 6'5"+
    XXXL 5'9" 6'5"+
    XXXXL 5'9" 6'5"+
  • Size 54 - 59 kg 59 - 64 kg 64 - 68 kg 68 - 73 kg 73 - 77 kg 77 - 82 kg 82 - 86 kg 86 - 91 kg 91 - 95 kg 95 - 100 kg 100 - 104 kg 104 - 109 kg 109 - 113 kg 113 - 118 kg 118 - 122 kg 122 - 127 kg 127 kg +
    XS 160cm 173cm
    S 165cm 180cm
    M 175cm 193cm
    L 175cm 196cm+
    XL 175cm 196cm+
    XXL 175cm 196cm+
    XXXL 175cm 196cm+
    XXXXL 175cm 196cm+

Dimension Details

  • Size Chest Waist Hip
    XS 33" - 35" 27" - 29" 34" - 36"
    S 35" - 37" 29" - 31" 36" - 38"
    M 37" - 39.5" 31" - 33.5" 38" - 40.5"
    L 39.5" - 42.5" 33.5" - 36" 40.5" - 43"
    XL 42.5" - 45" 36" - 38.5" 43" - 45.5"
    XXL 45" - 48" 38.5" - 42" 45.5" - 48"
    XXXL 48" - 51" 42" - 45.5" 48" - 50.5"
    XXXXL 51" - 54" 45.5" - 49" 50.5" - 53"
  • Size Chest Waist Hip
    XS 84cm - 89cm 69cm - 74cm 86cm - 91cm
    S 89cm - 94cm 74cm - 79cm 91cm - 97cm
    M 94cm - 100cm 79cm - 85cm 97cm - 103cm
    L 100cm - 108cm 85cm - 91cm 103cm - 109cm
    XL 108cm - 114cm 91cm - 98cm 109cm - 116cm
    XXL 114cm - 122cm 98cm - 107cm 116cm - 122cm
    XXXL 122cm - 130cm 107cm - 116cm 122cm - 128cm
    XXXXL 130cm - 137cm 116cm - 124cm 128cm - 135cm
Customer Reviews
5.0 Based on 17 Reviews
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Filter Reviews:
Dave W.
United States United States

Alpha Merino Air Long Term Review

My Alpha Merino Air has seen heavy use all winter. Ride temps ranging from 22F to 65F. Road, gravel, and mountain biking. Short pre-morning social rides through dawn-dusk mixed surface deep mountain adventures. I really like the jacket, will keep using it on colder days through our Spring transition, and expect it to be at the core of my kit next winter. Positives! Amazing warmth to weight. Good rear pocket capacity. Simple since does what used to be 2 layers. Breathes and dries well. Fit and construction are first rate. Zipper generally (not in all situations) easy to adjust with mittened hand. Easy laundering w/ air dry. Follow-up item worthy of note! Great for road and gravel, but definitely not a mountain biking jacket brushing against trees and taking the occasional biff. The jacket’s fabric is not up to this kind of high abrasion use. Managed to make a hole at my left elbow, but awesome that Velocio patched it for free! Super customer support.

  • Product fit True to size
  • Size purchased Men’s Medium. 6’-0”, 175#, 37/35/39.
Velocio Men's Alpha Merino Air Jacket ReviewVelocio Men's Alpha Merino Air Jacket Review
Greg W.
United States United States

True to the description

This jacket is definitely true to the product guides, and the recommended temp range of 25-45. Only a handful of rides so far, but when the temps reach the mid 40s, this can get hot on the climbs. But I have yet to get cold wearing this with just a sleeveless base layer. Wind blocking and comfort are great. I'm 6'2" 165lbs, size M fits well.

  • Product fit True to size
  • Size purchased M
Chan S.
United States United States

Pure magic, amazing jacket

Checks every box and even boxes I hadn't thought of :-) Lightweight. Luxuriously soft and comfortable. Warm enough to ride at tempo done to the teens F (with decent base). Breathable enough to work into the 40's without sweating. Attention to all the details--extended cuffs, raised fleece collar, accessible/expandable pockets. I've tried this out on several wintry rides and trading out base layers from a summer weight merino to Velocio's heavy merino base am perfectly fine wearing this well below freezing and in light precipitation. I doubt it would hold up well in steady light rain. What I really like most about this, other than the beautiful style and color, is that it covers such a wide range of temps that it's become my primary winter shell. I'd note that it is designed to breathe/vent, which means you'll get a light airflow--not enough to chill, but enough that if you're just ambling at low effort you might not get much thermal benefit. Anything zone 2 and up, though, and not only will you remain warm but it manages to avoid building up humidity or sweat inside. This goes down as one of the best cycling apparel purchases I've ever made!

  • Product fit True to size
  • Size purchased Med
United States United States

Great Cold weather gear

I love the jacket And the two base layer shirts l got and they have great customer service

  • Product fit Runs small
  • Size purchased Purchased a small first had to get a medium
United States United States

Up to Its Billing

Warm, light weight, and very nice cycling fit. Worn in 40 degrees, wind 20 mph and with a base layer, fleece jersey was comfortable without becoming soggy from sweat. Sleeves long enough to overlap gloves. Usually wear large (5’9”, 170 lbs), but had to return for an XL. Customer service was prompt and seamless. Very pleasantly surprised at warmth and light weight.

  • Product fit Runs small
  • Size purchased XL

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