Replacement back straps for Flex Boots, sold individually. To order a pair, please add two into your basket.


The back strap goes around the back of the foot, over the heel bulbs and attaches to both sides of the boot with ball rivets. Back straps are available in four sizes and four colour options, so you can make your Flex Boots unique to you. Detailed instructions for correct fitting of the back straps are in our fit & size section, and a video tutorial can be found in the Flex Boot YouTube channel.

Back Straps

  • Flex back straps come in four sizes that correspond to these boot sizes:

    Back strap size Goes with boot size(s)
    X-Small 80-90
    Small 100-110
    Medium 120-130
    Large 140
    X-Large                150