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  • Finance Available0% on orders over £300

Free Returns*

We now offer free returns on any UK Mainland order (excluding Highlands) over £25. Most importantly, returning an item to us is super simple. Just click here or on the 'create a return' link located at the bottom of every page, and create your return in under 1 minute. You can choose from any UPS Access point close to you where you can drop off your return at a time convenient for you.

Award Winning

There's a reason why our competitors spend so much time watching what we do, we believe in customer service levels beyond the norm and we're always looking for ways to improve. In late 2013 we were recognised for this by the bike industry's No.1 publication, Motorcycle News. As retailer of the year, we feel it's our duty to constantly better our offering and if you have any ideas, we'd love to hear from you!

200+ Top Brands

There simply isn't a better selection of biking brands anywhere in the UK and we're constantly updating every range to ensure you have the best choice available.

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We simply don't believe in making the sale and moving on, we want to make sure our customers are happy with their purchase. That's why we now offer a full 365 day returns period. Simply relax, take your time and make sure it's right! All we ask is that you try the items within your own home and return with the tags intact.

Free UK Delivery

It's really simple, if you spend over £25 with us, delivery is free of charge to any mainland UK address (excluding Islands & Highlands).

Finance Available

Why wait? We now provide some of the best finance packages around to help spread the cost and get you on the road. We now offer finance on most orders from as little as £280 with 0% packages starting at only £300. The online application process is super simple too and takes around only 5 minutes to complete! The best part is, there's no paperwork to print and in most cases you'll have a decision in under 10 minutes. Just select finance as a payment method and take it from there!

Alpinestars Protean Drystar Textile Pants - Black / Red

Waterproof pants with removable thermal liner and adjustable knee armour

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Was $194.54
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Customer Reviews for Alpinestars Protean Drystar Textile Pants - Black / Red

Alpinestars Protean Drystar Textile Pants - Black / Red
February 7, 2019

Absolutely love these!

I searched far and wide trying to find a good fitting pair of jeans, which didn't feel too big or baggy. Safe to say these are perfect for the more fitted look, very comfortable and breathable. Very warm in sub 0 temperature and feel like they would hold up in wet weather, and in case of an unfortunate accident. Top rating from me, can't fault them so far. I normally buy 30W32L in normal jeans and the small fits perfectly for these.

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Alpinestars Protean Drystar Textile Pants - Black / Red
February 6, 2019

Great product

I have worn these only in the cold weather so far and I'm not disappointed as have kept me warm in the very low February temperatures in Scotland. I am 5'11" with average build and went for the large which is a perfect fit. I can also wear jeans underneath these if I want with no real issues. These go perfect with my T-Jaws waterproof textile jacket.

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Alpinestars Protean Drystar Textile Pants - Black / Red
December 4, 2018

Very warm and comfy

Very warm and comfy trousers. They fit well without anything underneath, got an L for a 33 waist. They get a bit warm if temperature gets close to 15 but that's why it was removable liner. Totally recommend them.

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Alpinestars Protean Drystar Textile Pants - Black / Red
November 29, 2018

Snug as a bug in a rug.

Not much to say about these trousers that hasn't already been said in other reviews. They're very warm and cozy, completely waterproof, and fit comfortably when riding. I've just done an hour's commute in pouring rain wearing them zipped in to my existing Alpinestars jacket and I arrived warm and completely dry. Perfect for winter, maybe get something a bit less cozy for summer.

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Alpinestars Protean Drystar Textile Pants - Black / Red
October 14, 2018

Fit well, limited Velcro and great weatherproofing

One of the reasons I had to get rid of my last pair of trousers was the rubbish Velcro they put on gear to prevent it lasting too long. These trousers have some Velcro for adjusting the waist at the sides, but the bulk of the fasteners - certainly all of the fasteners you'll use regularly - are zips and buttons, so no need to worry about that. Fit-wise, what others say about them having a slimmer fit is quite right. I'm ordinarily a long-legged 34 waist and would have gone for medium, but went for large on the advice of other reviewers. When worn alone (or with very thin trousers/shorts on), they fit perfectly. A bit tighter when I've got jeans underneath, but doable. Can only echo other reviews as to how warm and water resistant these are. All in all, good quality gear.

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Alpinestars Protean Drystar Textile Pants - Black / Red
October 11, 2018


Super warm, super comfy. I have complete confidence in them during the winter.

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Alpinestars Protean Drystar Textile Pants - Black / Red
July 4, 2018

Great trousers at a sensible price

I bought these for a trip to Scotland expecting to test both the thermal and waterproof properties of the trousers. Fortunately the weather was glorious, so not really able to comment on either. What I can say however is that they were extremely comfortable. The profiled knee protection works well and is unobtrusive when sat on the bike. I was looking for something with a slimmer fit and these were perfect. The quality of the fasteners and zips is very good with plenty of adjustment to ensure an optimum fit. The inner lining is easy to remove and allows the trousers to be worn in warmer weather without losing any of the protection. Overall, really pleased with trousers, just need to test in the cold and wet weather; no doubt I won't have to wait too long!

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Alpinestars Protean Drystar Textile Pants - Black / Red
December 21, 2017

Great item, great value

Having moved from leathers for winder as I was sick of getting cold and wet I was not disappointed in these. Feel safe and secure and keep me totally dry. Are a little tight with the thermal liner in place if you wear trousers underneath. I'm a 35ish inch waste and are comfortable in XL and have room to spare. Really warm and kept me completely dry in heavy showers worn down to about 0 degrees so far and been totally fine. Fit over my boots too cant fault them at this price!

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Alpinestars Protean Drystar Textile Pants - Black / Red
December 11, 2017

Very warm

Put them on the house to try the size etc, had to take them off withing 5 minutes as they were too warm! Out on the bike they offer excellent warmth even in the recent low temps!

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Alpinestars Protean Drystar Textile Pants - Black / Red
December 8, 2017

Kept me toastie warm

Could not of asked for a better item. Really comfortable, kept me toastie warm on a bitterly cold day.

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Alpinestars Protean Drystar Textile Pants - Black / Red

  • Versatile multi-fabric poly-shell construction
  • DRYSTAR 100% waterproof and breathable liner
  • Removable thermal liner for comfort in cooler conditions
  • Removable CE certified knee protectors within internal mesh pockets
  • Adjustable knee armour height depending on rider's leg length
  • Pre-curved legs and an articulated knee construction provide high level of comfort
  • Stretch panels at crotch and knee enhancing freedom of movement
  • Internal hip compartments with tapered PE comfort foam for superior riding comfort
  • Connection zip allows attachment to selected Alpinestars jackets
  • High visibility reflective detailing to aid rider visibility
  • Velcro waist adjusters
  • Premium YKK zips
  • Extended zipped gusset at lower leg for a tight seal around the ankle
  • External flat storage pocket

Size Guide
EURO SIZE4446485052545658
Leg Length (In)293031.53233353536

Product Specification


Alpinestars, a truly world class brand of motorcycle apparel. Founded in the early 1960s by Sante Mazzarolo, Alpinestars has grown to be a world leading manufacturer of professional racing products such as leather jackets, jeans, boots and 1 piece suits. Whilst their leathers are worn by some of the biggest names in bike racing, they also specialise in high performance textile jackets, jeans and gloves. From F1 to Karting, the World Rally Championship to NASCAR, Alpinestars work with the very best drivers and riders to bring design innovations to all aspects of professional motor-sport.

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Questions and Answers

Questions and Answers

  • Hi, I require a waist size 32 which is a small I am aware in these trousers. What leg length are they ? Many thanks Michael

    March 2, 2017

    The inside leg measurement is 32 inches.

  • hello, I@M a 36uk eu 52;but need leg length 31'' short I would think. do you have these. thanks.

    July 14, 2016

    These jeans are not available in a short leg option.

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