The sweatshirts cost $55 and are available now via Represent.com/SRF. They'll be shipped starting Feb. 10.

Saget's widow, Kelly Rizzo, reposted the image and wrote, \"The Scleroderma Research Foundation @srfcure was Bob’s life‘s work. And now 30 years and millions of dollars later after he began, we can continue his legacy by helping find a cure for this horrific disease that took the life of Bob’s sister.\"

\"Thank you @johnmayer for designing this and making this happen,\" she added.

Among the stars who praised the initiative in the comments were Saget's close friend Jeff Ross, who wrote, \"Awesomeness ! I'm buying a bunch of these,\" and Mayer's close pal Andy Cohen, who wrote, \"Purchased! What a great idea.\"

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