These super-absorbent, breathable underpads are cost-effective and help you save up to 70% over other leading brands because they only require one DRY change every 8 to 12 hours. Made with Incon-Tek multi-layer technology inspired by NASA , they also use Liquistay Technology to lock in liquids and odors. Maximum capacity is 64 oz. The special, soft knit jersey fabric increases air flow so it's as comfortable as sleeping directly on bedsheets. Approx. 30"L x 35 1/2"W.