Giant Proshield MTB jacket review

Can Giant’s casually cut soft fabric waterproof MTB jacket cope with hard work and hard rain? We’ve been steaming around stormy singletrack to find out

Giant Proshield MTB jacket
(Image: © Guy Kesteven)

BikePerfect Verdict

Some nice touches for a casual, soft, quiet jacket, but fabric struggles to keep you dry from inside or out


  • +

    Soft, stretchy external feel

  • +

    Clever magnetic catches

  • +

    Removable hood

  • +

    Casual cut

  • +

    Variable ventilation


  • -

    Low breathability

  • -

    Limited waterproofing

  • -

    Rubbery internal feel

  • -

    Expensive for performance

Why trust BikePerfect Our cycling experts have decades of testing experience. We'll always share our unbiased opinions on bikes and gear. Find out more about how we test.

Giant has been increasing its range of riding gear steadily for the past few seasons and we’ve worn the Giant Proshield MTB jacket on warm, wet days in spring and to the colder days of recent months. There are lots of clever features enhancing a sound fit for casual cruising on showery days. Start working harder or heading into serious rain though and the fabric can’t cope. 

Fit is generous without being too billowy, and while the shock cored tightened hem has no extra drop, the arms are really long with a basic but effective velcro tab closure for a snug glove connection. The collar is tall, with a soft liner for comfort and there’s a zip on/off peaked hood that’s big enough to pull over a helmet. It has a really neat tab in a hidden velcro pocket to anchor the bottom corners too. You get two big hand pockets with zip closure and the main zip has a baffle on the back and a big over flap on the front, secured with five magnetic studs top to bottom. 

The ProTextura Plus fabric is stretchy and relatively quiet so while the shoulder cut is basic, mobility is fine. It’s fully taped inside and the 10k WVT breathability is helped by short armpit zips and a pyramid of laser-cut vent holes under an open-bottom yoke flap. 

The result is a jacket that cruises nicely at low intensity, with little of the rustle or bagginess that can make some waterproof jackets intrusive. As soon as you start working remotely hard though the fact that the 10k WVT rating isn’t actually very good becomes very clear. Even with the pit zips open, base layers get wet very quickly and they stay that way too. The rubbery inner feel of the three-ply fabric contributes to the cold and clammy vibe, especially if you’re in short sleeves. While the outer sheds water pretty well at first (even after washing without re-proofing) and it dries relatively fast, it doesn’t take long to wet out in heavier rain which impacts breathability further. Again the 10k proofing rating is low, especially for a jacket that costs more than £100, so sustained rain soon contributes to the wetness inside. The various features also add bulk when it comes to packing down, so it won’t fit into a back pocket and it’s likely to overfill most waist packs too. 

Giant Proshield MTB jacket

The hood is very large but can be removed when not needed (Image credit: Guy Kesteven)


It's a comfortable jacket for casual rides which is reasonably quiet and features a removable hood, however the Proshield starts to struggle to deal with moisture if you are working hard or the heavens open. While the jacket does have plenty of thought-out features, if you are looking for protection from the elements there are better options at this price range.

Tech Specs:  Giant Proshield MTB jacket

  • Price: $137 / £124.99
  • Sizes: S-XXL
  • Weight: 420g (M, with hood) 
  • Color: Blue
Guy Kesteven

Guy has been working on Bike Perfect since we launched in 2019. Hatched in Yorkshire he's been hardened by riding round it in all weathers since he was a kid. He spent a few years working in bike shops and warehouses before starting writing and testing for bike mags in 1996. Since then he’s written several million words about several thousand test bikes and a ridiculous amount of riding gear. To make sure he rarely sleeps and to fund his custom tandem habit, he’s also penned a handful of bike-related books and talks to a GoPro for YouTube, too.

Current rides: Cervelo ZFS-5, Forbidden Druid V2, Specialized Chisel, custom Nicolai enduro tandem, Landescape/Swallow custom gravel tandem

Height: 180cm

Weight: 69kg