As we know, the thick bands are more durable and bring us more power to shot large or need ammo. Even though the retraction is slower than thin bands, but there are still enthusiasts love its service life and strong pull force. Also some kind of slingshot (like classic Spanish slingshot) is designed to accommodate thick but narrow bands.
To meet this kind of requirement, slingshooting.com produces this 1.5mm thickness bands jointly with ALS champions bands. Its quality is promised.