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Founded by athletes with a passion for performance

Complimentary worldwide delivery on all orders over £150



Use this to convert between standard size formats


Waist 30 – 32 32 – 34 34 – 36 36 – 38
Inside leg 6.5 6.5 6.5 6.5
Outside leg 15 16 16 17
Waist 80 82 86 92+
Inside leg 17 17 17 17
Outside leg 40.5 41.5 42.5 43.5

The Marco shorts are cut to an athletic fit, with slimline outer leg tailoring offset by the more regular fitted inner leg hem to provide exceptional aesthetics and perfect comfort during intense exercise.

Marco – Royal Navy


  • (17)

Lightweight and efficient, the 6’’ Marco cohort short designed for maximum mobility and comfort, always go the distance in the most extreme conditions.

  • s
  • m
  • l
  • xl

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Built from the inside out with a highly breathable liner, elastic waistband and utilising a quick drying warp knit fabric infused with silver technology, the Marco short is the most technical on the market. Engineered with bonded seams to minimize weight and maximize flexibility of movement, while reserving traditional thread and needle at key points of articulation. Laser cut holes and the ultra lightweight mesh liner keeps you dry meaning you can go faster for longer. Stretch woven bonded pockets with a hidden mesh credit card slit and a strategically placed towel holder provide ample storage when you most need it. The welded shorts are the perfect partner for your workouts in the gym, on the track or in the pool.

"The Marco shorts are brilliant in the gym, look stylish on a run and actually work really well to swim in. The fabrics and build quality are excellent and they are made of a quality that is likely to last far longer than other shorts." Wild Running

Product details

Pack light, train harder. After months of development and testing, the Marco short is treated with an advanced polygiene treatment which guarantees anti-microbial protection for the lifetime of the garment. Polygiene uses recycled silver to tackle odour producing bacteria whilst not interfering with the bodies natural bacteria equibirium.

The extreme fineness and structure of our Italian fabric means the drying times of the Marco short is second to none. Complimented by the open honeycomb structure dispels moisture and evaporates it before it turns to sweat, allowing you to stay dry at all times.

Bonded pockets with internal credit card slits and locker hoops provides ample storage for multi-purpose use allowing you to take all your valuables on every training journey. A functional towel holder / tee holder on the back waistband provides additional storage for any extra cargo.

The special construction of the warp knit with the LYCRA® fibres, Sensitive® Fabrics are more durable and resistant to the corrosive action of chlorine and protect it from the salt. Combined with the quick drying properties you can go from run to swim to run in seconds.

Laser cut holes
Welded seam construction
Lifetime odour resistance
Quick drying
Hidden bonded credit card pocket
Moisture wicking
Tri-dimensional stretch fabric

Articulated pattern for ease of movement
Bonded side slits for ease of stride
Elastic waistband
Three bonded pockets
Locker loop
Hidden mesh envelope credit card pocket
Discrete reflective elements

UPF 50+ protection
Non iron

Eco-system certified

Fabric composition

Body: 72% Polyamide/ 28% Elastane
Trim: 100% Polyester





Washing instructions

Machine wash cool (30°)
Wash dark colours separately
Do not use fabric softeners
Do Not Tumble Dry
Cool iron (one dot)
Do not bleach
Do not dry clean


  • Super comfy and 3 zipped pockets!!

    TD - August 16, 2016

    Great pair of shorts, ultra comfy with a super smooth inner lining. I am a stickler for pockets and these shorts have 3 zipped pockets, a hidden locker hoop and a hidden key pocket - I couldn't ask for anymore. Also love the laser cut hole details.

  • Haven't found a better pair of shorts

    Dave F - September 2, 2016

    Best pair of gym shorts I've ever owned. Used for 5 consecutive gym sessions with the Hoddle tee and got numerous compliments on style whilst also performing amazingly well - no chafing, super light and very breathable. The length and cut is perfect meaning I can wear them out of the gym without looking like a rugby player! (I am 6ft 3 and 16 stone). The customer service was a nice added touch - they responded to all my questions on size promptly and also gave a couple of other pieces of advice - this was complimented by the personal handwritten card delivered with the package.

  • Will be ordering more

    K - November 24, 2016

    This has been my first Castore purchase and despite the high price point I am very impressed - the fit of the shorts is perfect, long enough to provide good coverage but really well cut with a more athletic fit than other shorts I've worn. I've worked out intensely both indoors and outdoors in them and the comfort has been great. The small details, such as the inner mesh fabric and compression within the zipped pockets also really impressed me. Not likely to be my last Castore order!

  • Expensive but amazing quality

    Clive - December 21, 2016

    Brought the bundle after reading the reviews and although more expensive that what I would usually pay well worth the money. Lightweight, nice length and a really comfortable liner.

  • Very nice and great service.

    Hector - February 4, 2017

    Ordered the bundle and best gym gear I've ever bought. Lightweight, comfy and great fitting. Bought from Portugal and it arrived next working day with personal note.

  • Amazing quality

    Alistair - February 14, 2017

    Don't wear anything else now - perfect length and beautifully made compared to a normal gym short. Looking forward to some more colours

  • Well done!

    Ralph - March 10, 2017

    After years of searching I have never found a pair of shorts as good as these. Great fit but more importantly the zip pockets which hold my phone tight when running are a game changer for me.

  • Go to shorts

    Lawrence Davies - March 21, 2017

    great cut and fit. No chafing and no riding up issues which I usually experience!!

  • London marathon purchase

    Harvey Speil - March 25, 2017

    Bought for London marathon training. Perfect for someone who like me runs every day and sweats alot. Super light and dry in seconds. Also no smell!!!

  • Bestrunning shorts I own

    Markus L - April 6, 2017

    Brilliant -really comfortable over long runs. Will be wearing in this years Boston Marathon

  • Exceptionally made

    Francois - April 12, 2017

    The quality is second to none.

  • Very good

    Brian Hondle - April 13, 2017

    Very nice fit

  • The quality is fabolous

    Lorent - April 21, 2017

    Can't wait for new colourways

  • Comfy and stylish

    Freddie A - April 28, 2017

    Expensive but can't fault them one bit.

  • Best pair of shorts I've bought

    Lukas P - May 29, 2017

    Owned for 6 months now and have bought three pairs since. Can't wait for new colours to be released

  • Present for boyfriend

    Nathan - June 28, 2017

    He absolutely love's them and is waiting for more colours to come out

  • Go to shorts for marathon running!

    Freddy M - July 14, 2017

    These shorts are my saviour for running marathons. Can't run in anything else. Super light and comfortable.