This First Day Coin Cover was issued by the US Mint to commemorate the new Sacagawea dollar. 200,000 coin covers were produced.
My example here was hand-signed by both obverse designer Glenna Goodacre and reverse designer Thomas D. Roger Sr.
Goodacre signed just thirty-eight coin covers, which were then donated to the New Mexico Nurses Association (NMNA) to be used for fundraising. Roger then later signed my coin cover after I was lucky enough to discuss the Sacagawea reverse design with him.
You can read more about the First Day Coin Cover at the wonderful Small Dollars website.