I can recommend the Shoe Snob's travel trees. I have two pairs. They are plastic and adjustable (within the size range). They are perfect for traveling. I put them in my packed shoes and wear my other pair on most trips. While they don't have all of the benefits of wood, they do keep the shoes shaped properly on their off day. And, they don't ruin your shoulder or cause you to pay extra baggage fees.
4/4/14 at 4:21pm