packaging for shipping

[crewneckconnect]

I just bought these, except in the 9 x 12 size.

http://www.ebay.com/itm/200-10x13-OPAQU ... 20c299d03c

The seal is pretty strong, I haven't needed to use tape.

[jimmyj]

Ive used similar ones for a while with extreme guilt given these don't breakdown in landfills. Has anyone found an environment friendly envelope that is safe for t shirts?