Rusk Str8 Anti Frizz and Anti Curl Lotion 6 Oz

Part of the iconic Rusk Designer Collection — a Beauty Launchpad Readers Choice Award 2025 winner for Best Smoothing Product — Str8 is a light, greaseless styling lotion formulated to tame thick, curly, wavy, permed, or unruly hair into smooth, polished, obedient results. At the heart of the formula is Thermplex, a proprietary heat-activated complex that works with the warmth of a blow-dryer to penetrate the hair shaft and alter internal curl memory, delivering smoothness that starts from within rather than just coating the surface. The Thermplex complex is built on a powerhouse trio: Panthenol (Pro-Vitamin B5) to add body and shine, Dimethiconol Meadowfoamate as a heat-responsive conditioner that penetrates the strand, and Dimethicone to smooth the cuticle and lock out atmospheric moisture. Together, these actives block humidity for up to 24 hours, so styles stay sleek and frizz-free well beyond the blow-dry. The formula is enriched with Castor Oil and Hydrolyzed Wheat Protein to further nourish and strengthen hair while Glycerin supports moisture balance, leaving strands feeling soft, touchable, and never weighed down or greasy. Once dried, the lotion becomes completely invisible in the hair — no residue, no flaking, no stiffness — just a naturally smooth, shiny finish. The product is finished with a Rainforest Radiance scent that layers sparkling green citrus and ginger with jasmine, cedarwood, warm amber, vanilla, and musk for a sensorial experience that feels modern and fresh. It is ideal for anyone with frizzy, curly, wavy, wiry, or permed hair who wants salon-quality straightening results at home, and it performs beautifully on all hair types. How to Use Shampoo and condition hair thoroughly, then towel-dry to remove excess water. Apply a dime-size amount (adjusting for hair density) evenly from roots to ends while hair is still damp. Blow-dry using a round brush or paddle brush, directing heat downward along the hair shaft to activate the Thermplex complex and achieve maximum smoothness. For a sleeker, longer-lasting result, follow with a flat iron or straightener on dry hair.