Waterproof Phone Case – FIDLOCK | Hermetic Self-Sealing Dry Bag (Medium Size)

The FIDLOCK Waterproof Phone Case is the ultimate protection for your smartphone and valuables — whether you’re paddleboarding, wingfoiling, kayaking, hiking, travelling, or simply spending time on the beach. Using FIDLOCK’s patented Gooper® magnetic self-sealing technology, this case automatically locks watertight the moment you let go. No rolling, no zipping — just a perfect seal every time.

Designed to be 100% waterproof, sandproof and dustproof, the case keeps your device fully protected while still offering complete touchscreen functionality, letting you take photos, answer calls, use navigation apps, and operate your phone normally through the clear window.

The S-size “medi” format is perfectly shaped for smartphones, keeping them secure, protected and easily accessible. With zero interference to electronics, key fobs or bank cards, it’s safe for all your essential items.

Whether you're on the water or on the move, this is the easiest and most reliable waterproof phone case available.

Key Features

• 100% waterproof & sandproof — Keeps your phone dry in any environment

• Automatic magnetic sealing — Self-closing Gooper® technology for a perfect seal

• Full phone functionality — Touchscreen works through the case

• No interference — Safe for key fobs, cards & electronics

• Lanyard included — Wear around the neck for hands-free carrying

• Drop & splash protection — Ideal for water sports, travel & outdoor use

• Perfect smartphone size — Designed as a medium-size phone dry bag

Technical Specifications

• External size: 148 × 203 × 9 mm

• Internal usable space: 110 × 180 mm

• Lanyard length: 400 × 9 mm

• Weight: 50 g

• Closure: FIDLOCK Gooper® magnetic self-sealing system

• Waterproof rating: Fully waterproof and submersible

• Materials: TPU film + magnetic sealing ribs

Size Guide

• FIDLOCK HERMETIC Dry Bag Medi (S-size)
  Perfect for most standard smartphones.

What’s in the Box

• 1 × FIDLOCK Waterproof Phone Case (Medi size)

• 1 × Adjustable lanyard

Who It’s Aimed For

Perfect for:

• SUP & wingfoil riders

• Kayakers and canoeists

• Beach & surf users

• Travellers and backpackers

• Cyclists and commuters

• Anyone who needs waterproof phone protection

Care Instructions & Warranty

• Rinse after saltwater exposure

• Keep sealing area clean for best performance

• Avoid storing in extreme heat

• Do not puncture or crease the magnetic ribs

• Covered by FIDLOCK manufacturer warranty

Why This Product Is Good for Watersports

The self-sealing magnetic closure means zero user error, making it far more reliable than zipper or roll-top alternatives. Perfect for riders who need quick phone access while keeping it fully protected on the water.

Why Buy from Northern Watersports

• 100% genuine FIDLOCK products

• Fast UK delivery

• Trusted by real riders & instructors

• Expert advice and customer support

• Supporting an independent UK watersports retailer