Stop Sweat Before It Shows: The original Thompson Tee sweatproof undershirt for women blocks underarm sweat, pit stains, sweat marks and yellow stains before they reach outer layers; built for for heavy sweaters and those with hyperhidrosis Patented Hydro-Shield Protection: Proprietary moisture-wicking underarm sweat pads absorb and block sweat at the source, creating a built-in barrier that helps stop wet marks before they reach your outer layer Versatile Sweat & Odor Defense: Stylish cotton scoop neck undershirt layers under blouses, tees, light-colored sweaters, dresses and uniforms while blocking sweat and body without visible sweat marks or odor transfer Discreet Fit With Less Underarm Bulk: Tailored sweat shield pad design and underarm seam help the shirt fold naturally with your underarm, reducing bunching under clothing and providing hidden protection under outfits; effective after many washes Original Fit Cotton Comfort: 100% premium combed cotton, exclusive of pad inner layer; tagless with lay-flat neckline, machine wash and dry safe, aluminum-free and never chemically treated; designed in the USA Thompson Tee is the original sweatproof undershirt designed for people who struggle with visible underarm sweat, pit stains, yellow stains and odor transfer. Built for heavy sweaters, and those with hyperhidrosis, each Thompson Tee features patented Hydro-Shield sweatproof technology with fully integrated underarm sweat shields that absorb sweat, block breakthrough and help protect outer shirts before sweat marks show. Unlike a standard undershirt, Thompson Tee is engineered with real underarm coverage where heavy sweaters need it most. The built-in Hydro-Shield pads add structured sweat-blocking protection, while the underarm seam helps the sweat shield fold naturally with your arm to reduce bunching and improve comfort under clothing. Wear Thompson Tee under dress shirts, polos, tees, uniforms, sweaters, work shirts and everyday layers for added confidence at the office, while traveling, during interviews, weddings, presentations, date nights and high-stress moments. The shirt is designed to look and feel like a premium undershirt while helping protect the clothing people see from sweat marks, pit stains, yellow stains and underarm odor transfer. Thompson Tee sweatproof undershirts are made with soft, breathable fabrics such as cotton and rayon blends, depending on the style, and are available in original fit and slim fit options. Original fit offers a more relaxed, traditional undershirt feel, while slim fit is closer to the body for smoother layering under fitted shirts. As seen on Shark Tank and featured by major media outlets, Thompson Tee was created to give heavy sweaters a practical, comfortable garment solution for daily sweat protection. With patented Hydro-Shield technology, built-in sweat pads and a fit made for real life, Thompson Tee helps you stay confident before sweat reaches your outer shirt.