Ghostek Nautical Slim Samsung Galaxy S25 Ultra Waterproof Case

In this review the Ghostek Nautical Slim for the Samsung Galaxy S25 Ultra is assessed for users who need dependable, full coverage protection without adding bulky bulk. The bottom line: it is best for people who want a watertight, heavy duty case that still allows S-Pen use and MagSafe compatibility. The one biggest reason to buy is the watertight full body design that enables underwater photos and shields the phone from water, dust, sand and shocks while keeping the screen and camera covered.

Key Features

• Watertight Seal: The full body enclosure provides a watertight barrier so users can take underwater photos and videos with confidence.
• Allaround Protection: The case protects against water, dust, dirt, sand and snow, making it suitable for beach trips, hikes and wet conditions.
• Shockproof Build: Heavy duty construction is designed to withstand drops up to 12ft, reducing the risk of damage from falls.
• Built-in Screen and Camera Protection: An integrated screen protector and camera lens cover keep glass surfaces guarded against scratches and impact.
• S-Pen and MagSafe Access: The case preserves S-Pen access and is compatible with MagSafe style accessories for convenient everyday use.
• Two Finish Options: Available in glossy black and clear transparent finishes so buyers can choose protection with or without visible phone styling.

Who It's For

The Nautical Slim is ideal for outdoor enthusiasts, travelers and anyone who needs waterproof protection for the Samsung Galaxy S25 Ultra while still using the S-Pen and MagSafe accessories. It works well for beach days, boating, rainy commutes and rugged workplace environments where dust and drops are everyday risks.

Those who prioritize the thinnest possible profile or maximum speaker and microphone clarity may want to consider a low-profile case instead, since integrated seals and covers can slightly affect sound projection and may change the tactile feel compared with a bare phone.

Pros & Cons

Pros

• Robust watertight protection enables underwater photos and reliable defense against liquids and debris.
• Heavy duty shockproof design claims resistance to drops up to 12ft, helping prevent impact damage.
• Integrated screen protector and camera lens cover protect fragile surfaces without separate accessories.
• S-Pen access and MagSafe compatibility retain core S25 Ultra functionality and accessory use.

Cons

• Some users report slightly muffled sound and reduced call volume with fully sealed designs, so audio clarity can be affected.
• The full body enclosure adds noticeable coverage compared with minimal slim cases, which may not suit users seeking the lightest option.

Specifications

Brand	Ghostek
Model Fit	Samsung Galaxy S25 Ultra (6.9 in)
Protection Type	Full body watertight case with built-in screen protector
Drop Protection	Rated to withstand 12 ft drops
Special Features	Camera lens cover, S-Pen access, MagSafe compatible
Available Finishes	Glossy Black, Clear Transparent

Our Verdict

The Ghostek Nautical Slim is a strong choice for anyone needing serious environmental protection for their Samsung Galaxy S25 Ultra while keeping S-Pen and MagSafe functionality. It represents good value for users who prioritize watertight security and shock resistance, though those focused on the absolute thinnest profile or uncompromised audio may prefer a different style.

Frequently Asked Questions

Does this case allow underwater use?
Yes, the full body watertight seal is designed for underwater photos and videos, protecting the device from water ingress.

Will the S-Pen still work with the case on?
Yes, the case preserves S-Pen access so you can use the stylus without removing the case.

Does the case affect call or speaker sound?
Some users report slightly muffled sound or reduced call volume due to the sealed design, which is a common tradeoff with fully enclosed waterproof cases.