Myriad Pro in action on withings.com

.header-1 { font-family: myriad-pro, Arial, sans-serif; font-size: 40px; font-style: normal; font-weight: 600; letter-spacing: normal; line-height: 63.9375px; text-transform: none; color: #383335; }
.header-2 { font-family: myriad-pro, Arial, sans-serif; font-size: 40px; font-style: normal; font-weight: 600; letter-spacing: normal; line-height: 63.9375px; text-transform: none; color: #383335; }
.header-3 { font-family: myriad-pro, Arial, sans-serif; font-size: 40px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 63.9375px; text-transform: none; color: #383335; }
.header-4 { font-family: myriad-pro, Arial, sans-serif; font-size: 23px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 63.9375px; text-transform: none; color: #383335; }
.header-5 { font-family: myriad-pro, Arial, sans-serif; font-size: 23px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 63.9375px; text-transform: none; color: #383335; }
.content-1 { font-family: myriad-pro, Arial, sans-serif; font-size: 17px; font-style: normal; font-weight: 300; letter-spacing: normal; line-height: 25.6875px; text-transform: none; color: #383335; }
Myriad Pro is available from Fonts.com, Fontspring and Typekit.
Found by @mikesten on 27 Jun 2013.

Liked by:
@mikesten @AndOlesya

Myriad Pro