Another Avanti Ad!

[mfg]

in 1963, the Avisco Company placed a full page magazine ad featuring three completely new ideas.......1) 'Avrail', the most advanced rayon fiber known to man................2) A new class of American automobile, the Studebaker Avanti................and 3)................................?............................

[r1lark]

Levi Strauss or Levi's sportswear

Here is the text:

There are 3 completely new ideas in this picture!
Levi Strauss–Levi's sportswear . . . a new slack concept. Both continental and Ivy League styles have that smooth look that makes these slacks favorites for all activities. They'll look as good at the end of the day as they did when you put them on. That's because the rugged "Royal Grizzly" fabric with Avril rayon takes hard wear in stride without muss or fuss. Levi's Sportswear is convinced that you'll like these slacks. That is why they will guarantee to replace them within a one year period if you wear them out. Black, loden, brown, and beige.
Avril Rayon–Avril . . . the most advanced rayon known to man! It's the strongest rayon made for men's wear. And this Dacron polyester and Avril rayon blend shows this amazing new fiber off to the best advantage. Avril makes possible the remarkable luxury . . . the unflinching way this gaberdine takes to hard wear . . . gives it the best wash and wear qualities, too!
Studebaker Avanti–A new class of American automobile. Only in "Avanti" by Studebaker will you find this modern school of design. It's like an aero-dynamic wedge designed to defy the wind. Luxuriously fitted-out, it is the fastest American production car now on the road.

Here is the ad:

 

[mfg]

You 'nailed it' Paul...CORRECT ANSWER!