Where Fitness Meets Lifestyle. Tremor Apparel is a premium branded Sportswear/Gymwear company based in the UK. All of our garments have been uniquely designed to empower and accentuate the physique. We aim to bridge the gap between gym wear and fashion, by providing a fantastic range of products. Using our 25+ years of experience in the clothing industry, we are able to innovate and shake up the fitness industry.