Best Bet: Kayu Bamboo Sunglasses

San Francisco–based accessories label Kayu mimics the ethically inspired business model of canvas slip-on company TOMS Shoes: For every pair of sunglasses purchased, the brand funds a sight-restoring surgery for a person in India. The shades are crafted out of natural bamboo (kayu translates to wood in Malay) and feature 100 percent UV gradient lenses, so they’ll protect your eyes from the winter glare. The sustainable frames come in four styles, from oversize round lenses to more subtle Wayfarer shapes.

Kayu bamboo sunglasses, $180 each online.