In humid weather, sweat and heat conspire to make mascara run. Try the latest lash lengtheners designed to withstand the worst of the summer conditions. 1. Shu Uemura's Precise Length mascara (HK$210/6.5 grams) uses a triangular brush to help separate and lengthen lashes. It comes in smudge-proof hues of black, brown and blue. Available from Shu Uemura stores, including the one in Russell Street, Causeway Bay. 2. Jemma Kidd's Eyes Lasting Tint (HK$230/5ml) offers semi-permanent, waterproof lash colour that lasts for at least 24 hours without flaking. From Lane Crawford, Pacific Place, Admiralty. 3. Cyber Colors' Long Lash Fiber mascara (HK$98/10 grams) is a quick-drying formula with a thick brush designed to curl and separate. The formula resists flaking, smudging and clumping. From Sasa ( www.sasa.com.hk ). 4. Pupa's Diva's Lashes (HK$108/10ml) gives your lashes extra volume and high definition; its micro-granules of black cellulose make for thick lashes without clumps. From Sasa. 5. Chanel's Inimitable waterproof mascara (HK$210/5 grams) is said to hold in all conditions. Designed to add three-dimensional depth, intensity and lustre to your gaze, it comes in black, bronze, navy and emerald. From Harvey Nichols, The Landmark, Central. 6. Lancome's Virtuose (HK$220/6.5ml) comes in an unusual curved container. It contains a lash-coating polymer that gives a light and translucent texture, covering the lashes to separate and curl. It holds for up to 12 hours and is smudge-proof. From Lancome counters.