Columbia Sportswear's Omni-Shade clothing protects you from damaging UV radiation by blocking the majority of the sun's harmful rays, so you can stay out longer. Omni-Shade blocks Ultraviolet A and Ultraviolet B rays (UVA and UVB), helping to prevent sun burn and long-term skin damage through tight weave construction, UV reflectors, and UV absorbing technology. Unlike SPF (Sun Protection Factor), which is a measure of sunburn reduction from sunblock, and does not indicate any protection from UVA rays. UVA rays are much more harmful than UVB, and are present even on cloudy days. Omni-Shade provides protection from both UVB and UVA rays. Like sunblock, Omni-Shade is given a numeric value to indicate its level of sun protection. Unlike sun block, Omni-Shade does not wear off.
Omni-Freeze consists of specially shaped flat yarns that facilitate the release of heat, and feel cooler to the touch, during warm weather and active outdoor adventures. The specifically shaped yarns, when woven or knit together, create Omni-Freeze, which transfers heat from a surface at a faster rate than traditional fabric. The Omni-Freeze flat yarns increase the surface area of the fabric that contacts your bare skin, which transmits heat faster and feels cooler to the touch.