Lululemon 5-Year Basic Tee

The strategy here is simple: Pack a few T-shirts that wick, are comfortable, and fit you well – and only pack dark colors like black, grey, and navy. Why? You'll keep cool, you can wash and dry them at night, and their dark colors won't show dirt. We like Lululemon's 5-Year Basic Tee. It will change your mind about how comfortable a T-shirt should be. The lifespan, well, goes without saying. [$54; lululemon.com]