Bausch & Lomb Ultra Monthly Disposable Contact Lenses/6 Lenses Per BoxAvailable Powers : 0. 50 D to 6. 00 D (in 0. 25 D steps), 6. 50 D to 12. 00 D (in 0. 50 D steps) Material : A proprietary combination of unique silicones results in unsurpassed oxygen transmissibility and low modulus hence providing comfotable lens wear and superior eye health Design : MoistureSealTM technology helps retains 95% of moisture2 throughout the day, giving your eyes 16 hour comfort and softness in a thin, silicone package.