Kalas is a cycling apparel brand whose jersey-making history began in Tábor, Czech Republic, in 1994. The company designs and manufactures clothing and equipment for men, women, and children, with ranges for road cycling, triathlon, and leisure. Its products include short- and long-sleeved jerseys, bib shorts, tights, vests, jackets, base layers, and thermal accessories, as well as gloves, socks, and headwear. Triathlon options include tops, suits, and shorts, while casual collections feature T-shirts and sweatshirts.

Kalas offers several product collections, including PASSION, focused on carefully selected fabrics, precise construction, comfort, and performance, and MOTION, which pairs everyday comfort with distinctive colors and design. The brand also supplies official team and national federation apparel. Clubs can work with Kalas on customized cycling kits, with custom printing available for orders starting at five main garments. Its online store provides sizing guidance, customer support, and free returns within 30 days; shipping is free on orders from €130.