An excellent and much stronger alternative to velcro straps.
Godlyke Power-All PG-1M Power-Grip Pedal Mounting Tape keeps your guitar pedals on your pedal board where they belong. Power-Grip is an excellent alternative to pedal board Velcro.
Simple, yet ingenious, Power-Grip pedal board tape mates to itself via rows of tiny mushroom-shaped posts that form a much stronger bond than traditional "hook & loop" Velcro fasteners. Just cut to size, apply, and GRIP.