Cold, wind, altitude sun and dry indoor heat: how we change textures through the year in the valley, and how to think about sunscreen at altitude.

A new glass bottle can outweigh the formula inside it. What a refill saves, glass and aluminum compared honestly, and what we still haven't solved.

Cleanse, serum, moisturize: the order that works, what changes from morning to night, how long to wait, where sunscreen goes and when an oil helps.