Happy World Oceans Day! In celebration of this official United Nations holiday, I'm giving away   a ‘Save Your Oceans’ organic T-shirt from Nautica to one lucky MNN reader!

These men’s T-shirts are made of 100% organic cotton — and are available in medium and large sizes. This prize was provided by Nautica, but Nautica is not a sponsor, administrator, or involved in any other way with this giveaway. All opinions expressed in the post are my own and not those of Nautica.

To win, leave a comment by Sunday, June 13. Then check back on Monday, June 14, when I'll pick a name from a random drawing. Entrants must be 18 or older and located in the US or Canada only.

The opinions expressed by MNN Bloggers and those providing comments are theirs alone, and do not reflect the opinions of MNN.com. While we have reviewed their content to make sure it complies with our Terms and Conditions, MNN is not responsible for the accuracy of any of their information.