OWS500 Men's 4 mm Temperate Water Neoprene Swim Jammer

Ref :
Key feature
Neoprene jammer for training in the pool or in the sea that provides good buoyancy at the legs and enables better performance.
Users reviews
4.27 / 5 45 ratings

Products benefits

Thermal insulation
4 mm neoprene provides good thermal comfort for the lower body.
Neoprene product that helps the legs float well.
Ease of use
Stretch neoprene that is easy to put on.
Easy opening / closing
Waistband with inner cord to tighten and prevent water entry.


Main fabric : 90.0% Rubber - Chloropren (CR) - Neopren, Main fabric : 8.0% Polyamide, Main fabric : 2.0% Elasthane
Designed to
swimmers looking for extra buoyancy and light thermal protection
2 years


Storage Tips
Dry outdoors after washing.


AQUATHERMIC technology:
AQUATHERMIC components integrate thermal features to reduce thermal shock when entering the water, and also reduces the duration and intensity of the wind chill effect* when getting out of the water. It also improves thermal insulation between your body and the outdoors to enable you to swim longer in cold conditions

Users reviews

4.27 / 5 45 ratings
41 users recommended this product

At Decathlon, reviews are reliable.

  • Man
    18 September 2018
    That review has been deposited on this product version
    Neoprene shorts

    Bought these jammers a couple of weeks ago from the Gateshead store ,the sales assistant was brilliant helping me find them in store.i tried on a size 30 inch waist as thats my measurement waist wise,they were very tight,opted for the 34" which fitted well and provided flexibility when moving .im in the process of improving my frint crawl to do longer triathalons and needed to have a more streamlined approach in the water i found the product brilluant as the boyancy lifted my backside ut toward the water surface and enabled me to kick with ease and not have to worry about sinking .i think there excellent but try on first for best fit

  • Woman
    40-49 years old
    24 January 2018
    That review has been deposited on this product version
    Check your sizing!

    I ordered these in a 32" which I presume referred to waist measurement - they are a men's garment so as a size 10-12 lady I presumed they would be amply big enough, they were so tiny that I couldn't pull them up over the tops of my legs, and I'm tall and slim.

    Brand response :

    Dear Sian,

    Thank you for your recent feedback. We are sorry to hear that you found the neoprene jammers way too small. This model is not as flexible as the standard swimming jammers due to different component. We suggest to try the next size up. Please return you current item to local store or use the online procedure for full refund or exchange.
    Once again apologies for any inconvenience caused.

    Kind regards,


  • Man
    50-59 years old
    12 July 2017
    Use since 1 week or less
    That review has been deposited on this product version
    Excellent improvement to swimming technique

    I have been using a pull buoy training for triathlons but was not comfortable swimming with it. My coach suggested trying these neoprene jammers so I bought these. What an improvement - would highly recommend them ....