These sampler sets are a lot like the ones listed under "standard materials" but flat cotton is used in place of silk and PUL or synthetic fleece is used in place of wool.

Vegan pads may include the following: flat cotton, flannel, organic cotton fleece, organic cotton/hemp blend, cotton terry, cotton corduroy, PUL and synthetic fleece.

I recommend browsing these sets if you're looking for some sturdy, durable pads, even if you're not a vegan.