Vintage 60s Mod Tomato Tomato Orange Dress by Glenbrooke
No material content - fuzzy material.  Zipper on back of dress.  
Vintage size 7 - See measurements for fit:  Model is 58" US XS/2 and I estimate this will best fit modern US XS.  Do compare measurements to a similar cut dress you own.  Dress - 15.5" underarm to underarm, approx 31" bust/ 14" across waist so waist less than 28" / Hips 34" /Length- 32"
Flaw: small faint dark spot by front hem, see closeup.