Thats because curly hairs unique structure exposes its cuticle. When humidity gets in, curls expand with unwanted volume and look frizzy, undefined, and dull.
BRAND :   Advanced Climate Control Heat and Humidity Gel
DESIGNER :    Ouidad
For :   Unisex
All our Makeup Products are 100% Original by their Original Designers and Brand.

This gel seal every strand, lock in moisture and lock out humidity. Its high-performance anti-frizz nano technology with a protein derived from silk seals the cuticle to keep essential moisture in and humidity out.
BRAND :    Advanced Climate Control Heat and Humidity Gel by Ouidad for Unisex - 16 oz Gel
DESIGNER :    Ouidad
For :    Unisex
All our Makeup Products are 100% Original by their Original Designers and Brand.

It is a unique styling cream specifically that designed for tighter curls. It has a blend of conditioners including milk thistle and sweet almond extract for intense moisturization to feed and strengthen curls as it instantly defines and softens.
BRAND :    Curl Quencher Hydrafusion Intense Curl Cream by Ouidad for Unisex - 5 oz Cream
DESIGNER :    Ouidad
For :    Unisex
All our Makeup Products are 100% Original by their Original Designers and Brand.

It is a creamy deep conditioning treatment that restores essential moisture to dry, damaged, or over-processed curls. It helps curls to look better-defined and less prone to breakage or frizz.
BRAND :    Ultra-Nourishing Intense Hydrating Mask by Ouidad for Unisex - 7.8 oz Masque
DESIGNER :    Ouidad
For :    Unisex
All our Makeup Products are 100% Original by their Original Designers and Brand.