Based on this product's specifications, here are some alternatives and similar models
Tablet case Eiger Peak for Samsung Tab S11 — 500m water resistance, black
Summary description:
Eiger Peak 500m case for Samsung Tab S11 is a protective tablet case designed to provide water resistance up to 500 meters and reliable protection in wet environments. Sized for the Samsung Tab S11, it shields the device from water exposure and supports everyday outdoor use, travel, and fieldwork. The black finish offers a neutral look while ensuring secure handling and basic impact protection.