**[HomeDepot.com](http://www.passwird.com/links/mjjWOV)** has the Enerflex 4′ x 12′ Radiant Barrier Insulation Roll for **$4.36** with free site-to-store or free shipping on $45+. Features: Blocks solar heat in summer; retains heat in winter. Positive customer reviews.

* [Enerflex 4′ x 12′ Radiant Barrier Insulation Roll](http://www.passwird.com/links/tWMzxx) – **$4.36**
* [10-Pack Enerflex 16″ x 4′ Radiant Barrier](http://www.passwird.com/links/uCPhKJ) – **$8.50**
* [50-Pack Enerflex 16″ x 4′ Radiant Barrier](http://www.passwird.com/links/BMgm3R) – **$34.30**