Hi TS,
Sorry to hear this about your leash! We've sell lots of JJF Pro Leashes aroudn the world and have'nt heard this happen yet. From Hawaii's North Shore to cold Winters in Cape Town, South Africa we've had our team and customers rocking these leashes with no issues siunce we started just 2 years ago. Makes me thing your leash could have gotten snagged on something during use, transportation, or who knows what, causing the seams to rip.
Regardless, we'd like to get you taken care of since this would fall under our Lifetime Warranty any manufacturer defect, please send over a warranty request at the link below so we can get a replacement over to you ASAP.
https://veiasupplies.com/pages/warranty
Thanks!