In celebration of Earth Day, The Sak’s eco-extension, Sakroots, is hosting a celebrity bag auction supporting The Nature Conservancy’s Plant a Billion Trees campaign. For each dollar contributed to the initiative, one tree will be planted. Starting on the 8th and running to the 22nd, a celebrity autographed sakroots Pax Eco Weekender will be up for grabs, signed by Robin Wright Penn, Rosie Perez, Blair Underwood, Justine Bateman, Jessica Alba, Alec Baldwin, Sandra Oh and Mena Suvari.

Sakroots Pax Eco Tote is made of a jute/cotton blend canvas and has 100% natural cotton handles. It features The Sak’s signature peace print symbolizing the brands’ “happy & free” philosophy with artwork created by Paris-born graffiti artist. To hit the auction, jump here!