Living Proof NWOT Perfect Hair Day (PhD) Weightless Mask for Fine-Medium Hair This is a great mask and works as a conditioner replacement 2-3 times a week. For me, I found I needed even more moisture to control frizz so I switched to the intense moisture mask. That left this unused PhD Weightless Masks that I stored in a dark cabinet for the last few months. Product Condition: NWOT, unused. From a smoke-free home. Original owner, purchased from Von Maur Department Store. From Living Proof: Perfect hair Day™ Weightless Mask A weightless, silicone-free mask that revives dull, dry, or lifeless hair with hydration, softness, and shine in just 5 minutes. Key benefits • Up to 70% reduction in breakage after one use • Rejuvenates and rehydrates dull, lifeless hair without the weight-even fine or thin types • Replenishes healthy hair's naturally protective outer layer Highlighted ingredients. • Hemisqualane: Helps to smooth the cuticle, leaving hair silky and shiny. • Biomimetic emollient blend: Smooths + aligns individual hair fibers to boost overall shine, softness + manageability. • Amino acid blend: Increases hair's hydrophobiticy to lock in moisture. • Natural hair moisturizer: Conditions hair + increases manageability. • Murumuru butter: Softens hair + enhances shine.