Nike Flex Rep 4.0 Men's Dri-FIT 18cm (approx.) Unlined Fitness Shorts - Black/Black/Black

Sustainable Materials

Nike Flex Rep 4.0

Men's Dri-FIT 18cm (approx.) Unlined Fitness Shorts

50% off
University Blue/Black/Black
Black/Black/Black
Smoke Grey/Black/Black
Select SizeSize Guide
  • Fits small; we recommend ordering a size up

This product is made from at least 75% recycled polyester fibres

From squats to lifts to stretches, the Nike Flex Rep 4.0 shorts are made to perform your favourite workouts. The flexible fabric and reinforced seams stand up to the grind of even your most high-intensity exercise. With a relaxed fit and breathability where you need it, they help you feel confident and push the pace to reach your goals.


  • Colour Shown: Black/Black/Black
  • Style: FN3004-010

Nike Flex Rep 4.0

50% off

From squats to lifts to stretches, the Nike Flex Rep 4.0 shorts are made to perform your favourite workouts. The flexible fabric and reinforced seams stand up to the grind of even your most high-intensity exercise. With a relaxed fit and breathability where you need it, they help you feel confident and push the pace to reach your goals.

See ya sweat

Nike Dri-FIT technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable.

Made to Move

The 4-way stretch-woven fabric helps you move free and easy, and the back panel is perforated for extra ventilation.

More benefits

  • Designed for running, training and yoga
  • Length: 18cm (approx.)
  • Liner: unlined
  • Fabric: stretchy woven fabric with perforated panels
  • Storage: Zip pockets
  • Waistband: elastic waistband with a drawcord
  • Bonded taping on the back of the waistband

Product details

  • Body: 86% polyester/14% elastane. Shorts: 87% polyester/13% elastane. Pocket bags: 100% polyester.
  • Machine wash
  • Imported
  • Colour Shown: Black/Black/Black
  • Style: FN3004-010

Size & Fit

    • Model is wearing size M and is 6′1″ (185cm approx.)
    • Big & Tall model is wearing size 3XL and is 6'1" (185cm approx.)
    • Standard fit: easy and traditional
    • Fits small; we recommend ordering a size up
  • Size Guide

Free Delivery and Returns

Free standard delivery with your Nike Membership.

How This Was Made

    • The recycled polyester used in Nike products begins as recycled plastic bottles, which are cleaned, shredded into flakes and converted into pellets. From there, the pellets are spun into new, high-quality yarn used in our products, delivering peak performance with a lower impact on the environment.
    • In addition to reducing waste, recycled polyester produces up to 30% lower carbon emissions than virgin polyester. Nike diverts an average of 1 billion plastic bottles annually from landfill and waterways.
    • Learn more about our Move to Zero journey towards zero carbon and zero waste, including how we're working to design product with sustainability in mind and help protect the future of where we live and play.

Reviews (8)

4 stars

  • Great Gym Shorts!

    nappy_dappy - 21 Jul 2025

    Great gym shorts and fit really well. I am a large in all Nike shorts and these also fit true to size. The material like the trousers is tough and able to withstand scapes from dumbbells and bars. That is is really well thought out and the tough grid fabric in perfect for the gym. Overall great durability like the trousers. Hopefully they will last and still look good after daily gym use like the trousers. Would definitely recommend.

  • Best shorts

    AM991558899 - 18 Jul 2025

    These are my sons favourite shorts (age 21 18) zip up pockets are a huge plus. They do come up small so both had to size up 1 size.

  • Very disappointed- poor quality fabric

    ViktarH372332566 - 18 Jul 2025

    I bought these shorts, but a month after purchasing them they are already full of pills. The fabric feels cheap. Definitely not what I expected for the price. I regret this purchase and would not recommend these shorts to anyone!

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