by Calvin Klein
CK One Summer 2021 is a light, aquatic unisex fragrance designed for daytime wear during summer. It opens with a bright burst of citrus, eucalyptus, and watery notes, accented by fruitiness from rhubarb and watermelon. The middle and base notes feature a soft peach and white woods, subtly enhanced by ambroxan, giving it a slightly synthetic yet pleasant warmth. Overall, it’s a casual, refreshing scent that evokes a clean, sunlit day near the pool. It performs well as a wearable freshener during hot weather, though its longevity is modest, with most users noting a 3- to 4-hour lifespan on skin. The sillage remains intimate to moderate, making it suitable for close proximity without overwhelming. It’s not a standout or deeply unique fragrance, but it succeeds in delivering a cost-effective, approachable summer scent with a sleek bottle design. However, reactions are mixed — some praise its light, clean feel and suitability for everyday wear, while others find it overly synthetic, cloying, or dominated by harsh ambroxan, particularly on sensitive skin.