Want to look and feel like an eco-activist celeb this season? Actor Adrian Grenier shows you how — by dressing from head to toe in eco-friendly fashions from Nau.

Perhaps best known among environmentalists for his work with Oceana, the Entourage star is expanding his water-friendly activism, this time to support charity:water, a nonprofit that works to bring clean water to developing nations. Get the Nau Shroud of Purrin blazer Adrian’s modeling in the photo above — and five percent of the money you spend will be donated to charity:water.

Now, dressing like an eco-activist celeb doesn’t come cheap. The Shroud of Purrin blazer will put you back $350. That said, Nau makes some of the most fashion-forward yet practical and eco-friendly clothes out there — that you can wear for years, perhaps saving yourself money over the long run.

The blazer is 100 percent recycled and recyclable, being made of recycled post-consumer and post-industrial polyester waste. And as an added bonus for fashion-forward eco-commuters, the blazer has button-adjustable shaped cuffs that’ll cover the back of your hands when you bike! Plus, $17.50 of the $350 goes to charity:water — a decent-sized donation that’ll make you feel like an eco-philanthropist.

Adrian’s also wearing Nau’s free range plaid shirt and slim taper jeans in the photo (bigger version here) — which brings me to my burning question: How do you feel about tapered jeans for men?