This dopp kit from Lands’ End Canvas Store is constructed with waxed cotton canvas, leather trim, and a metal zipper. Waxed canvas is a good choice for a dopp kit because it is water resistant, quite durable and ages well. Selling for $30, this is most inexpensive waxed canvas dopp kit we could find. Land’s End also has a good return policy, they say “you can return anything at anytime for any reason for a full refund of its purchase price”.
Archival Clothing also makes a $60 waxed canvas dopp kit. It’s made in the U.S. with 10 oz canvas.