I'd use duct tape
I fix tents and horse rain rugs with duct tape... If the fabric is dry and clean when applied, it's amazing how long it lasts. The last patch on the back part of a rain rug endured a season of rain/snow/countless wallowing in mud and maschine wasching and still holds.
Jones Flagship 158, Ride Farah 153, Jones Solution wmn 156, Rad Air Jewel 159.5, Jones Mothership 156 - Ride Fame, Burton Escapade, Burton Lexa LTD, Spark Afterburner - Ride Cadence, Deeluxe Spark XV
The average human has one breast and one testicle ~ Des McHale