News flash! Geek chic is now eco-friendly, too. Payless’ Zoe & Zac line (designed by eco-model extraordinaire Summer Rayne Oakes), features affordable, sustainable shoes and accessories. The latest addition: knee-high striped and argyle socks, made from planet-hugging organic cotton. Autumn’s right around the corner and boot season is sneaking up fast, so staying warm in sustainable socks is a must. (We can’t argue with the price tag, either.)

+ Argyle Knee Socks $4.99

+ Striped Knee Socks $4.99

+ Zoe & Zac