I used this belt yesterday in the gym while doing deadlifts. And as I was bending the belt opened in the middle of the Rep. I dropped the bar and re-tightened the belt thinking i have not worn it properly. But the same thing happened again.
Thanks for your feedback, I am sorry to hear that our training belt does not fit your needs perfectly.
For better support and secure maintain, you should try our weightlift belt wide, which offer double buckles for heavy powerlifting (http://www.decathlon.in/fitness/body-training/fitness-and-weightlifting-accessories/weightlift-belt-wide/p-M1762047).
I invite you to bring back your belt to any store and get reimburse or upgrade to the weightlift belt wide, which should answer your fitness activity.
Sportively,Julien Mauro Brand Manager DECATHLON
Easy to fit and use, and plenty of adjustment as your shape changes. I use it at the Gym on a regular basis.
ease of fitting and support it gives
No bad points found yet